Question

Prove that a trapezoid is isosceles if and only if the base angles are congruent.

Answer 1

the definition of an isosceles triangle states that the triangle has two congruent "sides'.But the definition of isosceles trapezoid stated above,mention congruent base"angles", not sides(or legs)....THEROM: if a quardrilateral is an isosceles trapezoid,the diagonals are congruent.
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Answer 2

Answer:

Step-by-step explanation:

to prove that the triangle is isosceles loo at the shape and the measure that it has the top has to be acute