Coloque V para indicar verdadeiro e F para indicar falso para as afirmações: a) ( ) Um quadrilátero que tem as diagonais com comprimentos iguais é um retângulo.
b) ( ) Todo losango tem as diagonais com comprimentos iguais.
c) ( ) As diagonais de um paralelogramo cortam-se mutuamente ao meio.​

where is abdul's work? don't see that anywhere posted : /

step-by-step explanation:

1. 180°. the sum of the interior angles of a triangle is 180°, for the equilateral triangle that it has three equals side is 60°+60°+60°=180°.

2. 60°. each interior angle of a equilateral triangle is 60°

3. 120°. the measure of ∠m is 120°, the sum of the angles ∠m and ∠n is equal to 180°. so, in order to find the measure of ∠m, we have ∠m+∠n=180° > ∠m=180°-∠n > ∠m=180°-60°=120°.

4. 360°. the sum of the exterior angles of an equilateral triangle is ∠m+∠r+∠x=120°+120°+120°=360°. the exterior angles of any triangle always add 360°.

d is ur answer hopes this i dont really know how to explain it to u.