Question

Find the area of the shapes below. Make sure to label your answers with units.

Answer 1

Answer:

Step-by-step explanation:

Area of shapes

a) Triangle

  base = b = 7  km

  altitude or height = h = 3.8 km

     $\sf \boxed{\text{\bf Area of triangle = \dfrac{1}{2}b*h }}$

                                    $= \dfrac{1}{2}*7*3.8\\\\= 7 * 1.9\\\\= 13.3 \ km^2$

b) Rectangle:

     length = l = 8.2 cm

     width  = w = 7 cm

      $\sf \boxed{\text{\bf Area of rectangle = l*w}}$

                                        = 8.2 * 7

                                        = 57.4 cm²

c) Parallelogram

            base = b = 9.1 km

           height = h = 5 km

$\sf \boxed{\text{\bf Area of parallellogram =b*h}}$

                                          = 9.1 * 5

                                          = 45.5 km²

d) Trapezium

           Parallel sides a = 8.9 m  & b =  2.7 m

           height = h = 4.2 m

$\sf \boxed{\text{\bf Area of trapezium = \dfrac{(a +b)*h}{2} }}$

                                   $\sf =\dfrac{(8.9+2.7)*4.2}{2}\\\\=\dfrac{11.6*4.2}{2}\\\\= 5.8 * 4.2\\\\= 24.36 \ m^2$

Answer 2

Answer:  

1# 13.3 Km

2# 57.4 Km

3# 45.5 Km

4# 24.36 Km