Me
referring to the figure, find m∠1.

hello!

Your answer is 150°

the 30° angle and ∠1 are a linear pair, and are supplementary. therefore they add up to 180°

take the 30°, subtract it from 180°, and you get 150°

equation:

∠1 + 30° = 180°

subtract 30 from both sides and you get 150°

I hope this helps, and have a nice day!

proofs involving isosceles triangles often require special consideration because an isosceles triangle has several distinct properties that do not apply to normal triangles.(more about triangle types) therefore, when you are trying to prove that two triangles are congruent, and one or both triangles, are isosceles you have a few theorems that you can use to make your life easier.

step-by-step explanation:

an isosceles triangle has two congruent sides and two congruent angles. the congruent angles are called the base angles and the other angle is known as the vertex angle. ∠bac and ∠bca are the base angles of the triangle picture on the left. the vertex angle is ∠abc

a

step-by-step explanation: