Question

Find the area and perimeter.

Answer 1

Answer:

Area = 6x + 36

Perimeter = 3x + 10

Step-by-step explanation:

Sides of the triangle:  12 ; (x - 7)  & (2x + 5)

Perimeter of the triangle = sum of all the sides

      = 12 + x - 7 + 2x + 5

      = 2x + x + 12 - 7 + 5     {Combine like terms}

      = 3x  + 10

Area of triangle:

Base = 12  & height = h = x +6

$Area = \dfrac{1}{2}b*h\\\\=\dfrac{1}{2}*12*(x+6)$

= 6 *(x + 6)       {Use distributive property}

= 6*x + 6*6

= 6x + 36