Question

Find the perimeter of the given triangle

Answer 1

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.