In which of the following quadrilaterals are opposite angles always congruent? check all that apply.

a square
b parallelogram
c rhombus
d quadrilateral

A and B

Step-by-step explanation:

In square and parellelogram opposite angles are always equal. While the rest do not have opposite angles equal

i would say the third one.

step-by-step explanation: liner would mean in a line and the only one that doesn't look like it's even thinking about forming a line would be the third one

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)