Which of the following statements is incorrect?

a. a triangle with three congruent sides is equiangular.

b. the isosceles triangle theorem can be applied to equilateral triangles.

c. the measure of each angle of an equilateral triangle is 120°.

d. a triangle with three congruent angles is equilateral.

Afurniture store has 1,500 chairs in storage. a manager uses three delivery receipts to simulate samples to check 100 chairs and note the number of brown chairs. suppose the actual number of brown chairs is 1,080. about how many brown chairs are

Ithink i know it but i want to be sure so can you me out ?

Given: ae ≅ ce ; de ≅ be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that △aeb ≅ △ced, we can show that △ ≅ △ceb by. so, ∠cad ≅ ∠ by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.