Classify the following triangle check all that apply

C and E

Step-by-step explanation:

it has one angle that's larger than 90° so we can say this triangle is an obtuse

its all side lengths are in different length so we can say this a scalane triangle

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6