Question

`(1)/(2 ) * (4)/(1) * (5)/(1)`it's the area formula

Answer 1

the area of triangle is equal to

`A=(1)/(2)\cdot b\cdot h`

In this problem we have

b=9 in

h=7 in

substitute

A=(1/2)*(9)*(7)

A=63/2

A=31.5 in2

Part 9

the area is equal to

A=(1/2)*(2)*(2)

A=2 ft2

because

the formula of area of triangle is

`A=(1)/(2)\cdot b\cdot h`

we have

b=2 ft

h=2 ft

substitute

`\begin{gathered} A=(1)/(2)\cdot2\cdot2 \\ A=(4)/(2)=2\text{ ft2} \end{gathered}`

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