Question

Can someone's answer this​

Answer 1

Answer:

See explanation

Explanation:

Required

The surface area of each shape

Triangle

$Area = \frac{1}{2}bh$

$b\to base; h \to height$

So:

$Area = \frac{1}{2} * 23 * 21$

$Area = 241.5m^2$

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

$Area = \frac{1}{2}(a + b)*h$

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

So:

$Area = \frac{1}{2}(18 + 23)*21$

$Area = \frac{1}{2}*41*21$

$Area = 430.5m^2$

Circle

$Area = \frac{\pi d^2}{4}$

$d \to diameter$

So:

$Area = \frac{3.14 * 5^2}{4}$

$Area = \frac{3.14 * 25}{4}$

$Area = \frac{78.5}{4}$

$Area = 19.625m^2$