Question

Can someone's answer this​

Answer 1

See explanation

Step-by-step explanation:

Required

The surface area of each shape

Triangle

`Area = (1)/(2)bh`

`b\to base; h \to height`

So:

`Area = (1)/(2) * 23 * 21`

`Area = 241.5m^2`

Square

`Area = l^2`

`l \to length`

So:

`Area = 10^2`

`Area = 100m^2`

Rhombus

`Area =a^2\sin(\theta)`

`a \to side\ length`

`\theta \to any\ interior\ angle` (not given)

So:

`Area =18^2\sin(\theta)`

`Area =324\sin(\theta)`

Trapezium

`Area = (1)/(2)(a + b)*h`

`a,b \to parallel\ sides; h \to height`

So:

`Area = (1)/(2)(18 + 23)*21`

`Area = (1)/(2)*41*21`

`Area = 430.5m^2`

Circle

`Area = (\pi d^2)/(4)`

`d \to diameter`

So:

`Area = (3.14 * 5^2)/(4)`

`Area = (3.14 * 25)/(4)`

`Area = (78.5)/(4)`

`Area = 19.625m^2`