Question

Help me with a. b. c. I need help

Answer 1

a) Perimeter = 20.5 Inches

Area is 15 Sq Inches

b) Perimeter is 61.4 Cms

Area is 210 Sq cm

c) Perimeter is 22 yards

Area is 21 Sq Yards

Explanation:

a) Perimeter = sum of all the sides

= 8+7.5+5

=20.5

Perimeter = 20.5 Inches

Area of Triangle =
`(1)/(2) * height * Base`

Base = 7.5 In

Height = 4 In

`A = (1)/(2) * 4 * 7.5`

`A = 2 * 7.5`

`A = 15`

Hence Area is 15 Sq Inches

b) Perimeter = Sum of all the sides

P=13+23+13.4+12

P=61.4

Perimeter is 61.4 Cms

Area of trapezium =
`(1)/(2) * height  * (sum \ of \ parallel \ sides)`

`A= (1)/(2) * 12 * (12+23)`

`A= 6 * 25`

`A=210`

Area is 210 Sq cm

c) Perimeter = Sum of all the sides

P = 7+4+7+4 ( as Opposite sides are equal in a parallelogram

P = 22

Perimeter is 22 yards

Area of a parallelogram =
`base * height`

`A= 7 * 3`

`A = 21`

Area is 21 Sq Yards