How do I calculate 2 angles in a scalene triangle when the third angle is 76 degrees?

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You need more information to be able to solve resolve the triangle.

All you can say is that the sum of the measures of the two unknown angles is

**sum of values of the two angles =(180-76) degrees.**

Posted on Nov 21, 2013

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Posted on Jan 02, 2017

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SOURCE: finding the length of a triangle

might try

(54tan)/45

I don't have a calc that will do it or I would try it and see.

Posted on Aug 01, 2008

SOURCE: given a length of 30 cm on the x axis and a length

Yes, there is shortcut because this is right triangle, so you can use Pythagorean theorem (see picture).

- Length of hypotenuse is square root of sum of squares of lengths of other two sides of triangle, which is equal to square root of 30^2+10^2=31.6 cm.
- Sin(a)=longer cathetus/hypotenuse=0.949 so a=arcsin(0.949)=71.6 degrees
- Finally b=90-a=18.4 degrees.

If this was helpful please rate 4 thumbs :)

Posted on Sep 05, 2011

If 2 angles are 45 degrees, the other must be 90, so Pythagorus' Theorem applies, so it is sqrt ( 1700^2 + 1700^2 ) = 2404.16

or

for triangles, a / sinA = c / sinC so c = ( 1700 / sin (45) ) * sin (90) = 2404.16.

or

for triangles, a / sinA = c / sinC so c = ( 1700 / sin (45) ) * sin (90) = 2404.16.

Oct 31, 2016 | The Computers & Internet

There is probably a formula for this or other ways of doing this, but I will give it a shot.

An octagon has 8 sides (octopus has 8 legs). To make an octagon, we effectively have 8 triangles joined at the centre. In the centre, we have 8 equal angles. Since a full circle is 360 degrees, each of these angles must be 360 / 8 or 45 degrees.

Now we can just focus on one of these triangles. We have an angle of 45 degrees at the centre and two arms extending out 10 feet.

At this point, we can use the cosine law to calculate the length of the side or we can recognize that it is an isosceles triangle and work out the other angles and determine the length of the side.

Using Cosine Law, a^2= b^2 + c^2 - 2xbxc Cos A

In this case, A = 45 degrees, b = 10 feet, c=10 feet.

Good luck.

Let me know if you have any questions.

Paul

An octagon has 8 sides (octopus has 8 legs). To make an octagon, we effectively have 8 triangles joined at the centre. In the centre, we have 8 equal angles. Since a full circle is 360 degrees, each of these angles must be 360 / 8 or 45 degrees.

Now we can just focus on one of these triangles. We have an angle of 45 degrees at the centre and two arms extending out 10 feet.

At this point, we can use the cosine law to calculate the length of the side or we can recognize that it is an isosceles triangle and work out the other angles and determine the length of the side.

Using Cosine Law, a^2= b^2 + c^2 - 2xbxc Cos A

In this case, A = 45 degrees, b = 10 feet, c=10 feet.

Good luck.

Let me know if you have any questions.

Paul

Aug 25, 2015 | Miscellaneous

A scalene triangle has sides that are all different lengths, as well as different angles as well.

Volume?? would be an amount that would be a liquid, usually.

Volume?? would be an amount that would be a liquid, usually.

Apr 08, 2015 | Miscellaneous

The third angle will be 45 degrees. You have an isosceles right triangle.

Mar 13, 2014 | Computers & Internet

I presume that x is the measure in degrees of the third angle. Use the fact the sum of the interior angle of a triangle is equal to 180 degrees.

x+128+37=180

x+165=180

x=180-165=15 degrees.

x+128+37=180

x+165=180

x=180-165=15 degrees.

Sep 16, 2013 | Office Equipment & Supplies

Answer:
angle a=9 degree
angle b=34 degree
angle c=21 degree
Explanation:
we have,
a+b=43............(1)
c+b=55..............(2)
c+a=30..............(3)
from (3) we get,
c=30-a...........(4)
substituting value of c from (4) in (2) we get,
30-a+b=55.........(5)
a+b=43..........(1)
(5)-(1) give
30-2a=12
30-12=2a
a=18/2=9 degree
giving value of 'a' in (1)
9+b=43
b=34 degree
similarly giving value of 'a' in (3)
c+9=30
c=21 degree

Oct 14, 2012 | TOPICS Entertainment Snap! Geometry...

Well, there is classification by sides, **equilateral** with 3 equal sides, **Isosceles** with two equal sides, and **scalene** with no equal sides, but you talk about angles, but I wanted to point out equilaterals have 3 equal angles, isoceles have 2 equal angles and scalene have no equal angles.

So, now we talk about angles: a**Right** trianlge has one angle that is 90 degrees, an **Obtuse** triangle has one angle greater than 90 degrees, and an **Acute** has no angles over 90 degrees.

Thus, it is possible to have a (scalene or isoceles) AND (acute, obtuse, or right) triangle, but never an equilateral AND (obtuse or right). The angles can't be equal and 90+ degrees if all three must equal 180 degrees.

So, now we talk about angles: a

Thus, it is possible to have a (scalene or isoceles) AND (acute, obtuse, or right) triangle, but never an equilateral AND (obtuse or right). The angles can't be equal and 90+ degrees if all three must equal 180 degrees.

Oct 06, 2012 | Mathsoft StudyWorks! Middle School Deluxe...

Yes, there is shortcut because this is right triangle, so you can use Pythagorean theorem (see picture).

If this was helpful please rate 4 thumbs :)

- Length of hypotenuse is square root of sum of squares of lengths of other two sides of triangle, which is equal to square root of 30^2+10^2=31.6 cm.
- Sin(a)=longer cathetus/hypotenuse=0.949 so a=arcsin(0.949)=71.6 degrees
- Finally b=90-a=18.4 degrees.

If this was helpful please rate 4 thumbs :)

Sep 05, 2011 | Texas Instruments TI-30XA Calculator

Hello this is Baris,

First off all when you say hypotinuse I think it is a 90 Degree triangle. Total of the angles off a triangle is 180 degree. So it is a simple algebra question.

Hypotinuse is 90

Right angle is R

Left angle is L

Total is 180

Equation is 90+ R +L = 180

We are looking for R, so lets arrange our equation.

R= 180 - 90 - L

R= 90 - L

This is our formula for excel

Lets put it in the excel

Type in A1 "hypotinuse "

Type in A2 "Left Angle"

Type in A3 "Right Angle"

Type in B1 90

Type in B2 "whatever the value given for the left angle"

Type in B3 =90-B2

As soon as you change the value in the cell B2, B3 will change by itself. Hope this helps :)

First off all when you say hypotinuse I think it is a 90 Degree triangle. Total of the angles off a triangle is 180 degree. So it is a simple algebra question.

Hypotinuse is 90

Right angle is R

Left angle is L

Total is 180

Equation is 90+ R +L = 180

We are looking for R, so lets arrange our equation.

R= 180 - 90 - L

R= 90 - L

This is our formula for excel

Lets put it in the excel

Type in A1 "hypotinuse "

Type in A2 "Left Angle"

Type in A3 "Right Angle"

Type in B1 90

Type in B2 "whatever the value given for the left angle"

Type in B3 =90-B2

As soon as you change the value in the cell B2, B3 will change by itself. Hope this helps :)

Sep 27, 2009 | Microsoft Excel for PC

might try

(54tan)/45

I don't have a calc that will do it or I would try it and see.

(54tan)/45

I don't have a calc that will do it or I would try it and see.

Jul 31, 2008 | Office Equipment & Supplies

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