For a school play the teacher asked the class to set up chairs in 20 rows with 25 chairs in each row after setting all the chairs they where 5 chairs short how many chairs did the class set up

495 chairs

Step-by-step explanation:

theres 20 each with 25 chairs

20 x 25 = 500

but they where short 5

500 - 5 = 495

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

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