Marie was trying to show her friend why -3 × -8 equals a positive product. this is what she wrote: -3 × 0 = 0 -3 × = 0 -3(8) + -3(-8) = 0 -24 + 24 = 0 what should marie write in place of the question mark? a. 8 + 8 b. -8 + (-8) c. 8 + (-8) d. -8 + 0

Atriangle includes one angle that 72º. which pair could be the measures of the other two angles of the triangle? a. 9º, 9º b. 26º, 46º c. 53º, 55º d. 72º, 108º

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2

Are triangles the congruent? write the congruency statement.what is the congruency that proves they are congruent? what is the perimeter of ∆pqr?