Question

PLEASE HELP ME !!???! I DONT GET IT

Answer 1

see explanation

Explanation:

the perimeter (P) is the sum of the 3 sides of the triangle, then

P = 31 + 19.5 + 16.2 = 66.7 units

the area (A) of a triangle is calculated as

A =
`(1)/(2)` bh ( b is the base and h the perpendicular height )

here b = 16.2 and h = 13 , then

A =
`(1)/(2)` × 16.2 × 13 = 8.1 × 13 = 105.3 units²