(7) Total area = 2.7 m²
(8) Total area = 6.3 m²
Explanation:
(7)
Total area = area of rectangle + area of triangle
Area of triangle = [tex]\frac{1}{2} X b X h[/tex]
[tex]=\frac{1}{2} X 1 X 3\\\\= \frac{3}{2}\\ \\= 1.5[/tex]
Area of rectangle = [tex]length X breadth[/tex]
[tex]=1.2 X 1\\\\= 1.2[/tex]
Total area = 1.5 + 1.2 mi²
= 2.7 mi²
(8)
Total area = area of rectangle + area of 2 triangles.
Base of 2 triangles = 4.3 - 1.7 m
= 2.6 m
Base of 1 triangle = 1.3 m
Area of triangle = [tex]\frac{1}{2} X b X h\\ \\[/tex]
[tex]= \frac{1}{2} X 1.3 X 2.1 m^2\\\\= 1.365 m^2[/tex]
Area of 2 triangles = 1.365 X 2
= 2.73m²
Area of rectangle = length X breadth
= 2.1 X 1.7m²
= 3.57 m²
Total area = 2.73 + 3.57m²
= 6.3m²
