ABCD is a trapezoid. = 1 cm and = 5 cm, and the area = 7.5 cm2. What is the altitude of the trapezoid? 1.5 cm 2.5 cm 3 cm 2 cm

2.5 cm

Step-by-step explanation:

The area (A) of a trapezoid is calculated as

A = h(a + b)

where h is the altitude and a, b the parallel bases

Here a = 1, b = 5 and A = 7.5 , thus

h (1 + 5) = 7.5, that is

× 6h = 7.5

3h = 7.5 ( divide both sides by 3 )

h = 2.5 cm ← altitude

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer

you probably already have the answer but anyways it's b. 15.0

step-by-step explanation: