Find the perimeter of the given triangle

Question

asked Mar 27, 2019 207k views

1 Answer

Sydney · Answer 1 · 2019-03-31T12:23:30+0000

Here it is given that the triangles ABP and DCR are similars, therefore we use the ratio rule which states that

corresponding sides of similar triangles are in same proprtion .

(AB)/(DC) = (BP)/(CR)

that gives

7/10 = BP/11

7*11=10BP

BP=7.7

Again using the ratio rule

(AB)/(DC) = (AP)/(DR)

7/10 = AP/6

42 = 10AP

AP = 4.2

Perimeter= AB+BP+AP = 7+7.7+4.2 = 18.9

Correct option is A.