Respuesta :

fnej

Answer:

4b) 180

4c) 114

Step-by-step explanation:

4)

Area of rectangle:

A = bh

A = 15*9

A = 135

Area of triangle:

A = 1/2bh

b = 15 - 9 = 6

A = 1/2(6)(15)

A = 45

Combined:

45 + 135 = 180

5)

1st rectangle:

A = 4*12

A = 48

Middle rectangle:

h = 12 - 9 = 3

A = 6*3

A = 18

Last rectangle:

A = 4*12

A = 48

Combined:

48 + 48 + 18 = 114

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