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If these two sides are opposite to these angles, and you know one of the angles, you can use the Law of Sines to find the other angle.

For example, in the triangle ABC the side a is opposite to the angle A, and the side b is opposite to the angle B. If you know the lengths of these sides, a and b, and you know the measure of the angle B, then

sin A/a = sin B/b multiply by a to both sides;

sin A = asin B

Use your calculator to find the value of arcsin(value of asin b), which is the measure of the angle A. So,

Press 2ND, sin, value of asin B, ).

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Q: How do you find an angle when you know one other angle and two of the sides of a triangle?

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To find side lengths on a triangle, you need to know at least one of the sides. The possible combinations for solving* a triangle are: side, side, side; side, angle, side; angle, side, angle; angle, side, longer side. *To solve a triangle is to find the lengths of all the sides and the measures of all the angles.

Use trigonometry

It really depends on the angle. If the angle is at the point where the two equal sides intersect then you can divide the triangle into two equal parts (forming a right angle with the base), divide the angle by two, then use the following equation(side*arccos(your angle/2))*((side*arcsin(your angle/2)))if the angle is not where the two equal sides intersect then you can divide the triangle into two equal parts (from the point where the two equal sides intersect down to a right angle with the base) then use the following equation.(side*arcsin(your angle)*(side*arccos(your angle))

take the number and divide it by 180 if it's a triangle

The only triangle that has a hypotenuse is a right-triangle. The hypotenuse is the side opposite the right angle, so the angle is always 90 degrees. In this case, if you're just finding the angle then you don't need to know what the side lengths are.

Related questions

You need to know the angle between them.

If it has an hypotenuse then it is a right angle triangle and if you know its angles then use trigonometry to find its other two sides.

It is a right angle triangle and its largest angle is 90 degrees

If you have the length of two of the sides and one other angle you can use the law of sines.

To find side lengths on a triangle, you need to know at least one of the sides. The possible combinations for solving* a triangle are: side, side, side; side, angle, side; angle, side, angle; angle, side, longer side. *To solve a triangle is to find the lengths of all the sides and the measures of all the angles.

If you know the 2 other angles, apart from the right angle you can calulate the other 2 sides.

The cosine rule which is: a2 = b2+c2-2*b*c*cosine A This is used to find the third side of a triangle when the two other sides are known along with the angle between them. Used when the triangle is not a right angle.

A right angle triangle has 3 sides as does all other types of triangles.

First find 180 minus the vertex angle and divide that by 2 to get the other angles. Then solve the other sides by using sin(vertex angle)/base=sin(other angles)/other sides.

Use trigonometry

add all of the sides together

The answer depends on what information you have, If you know only the lengths of the sides, you use the cosine rule to find the measure of one angle and then the sine rule to find the other angles.

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