Use the area of a parallelogram formula to calculate unknown measurements

Maths

In this unit pupils will explain how to calculate the area of a parallelogram and a triangle describing the relationship between scale factors and side lengths. They will describe positions in all four quadrants drawing and translating simple shapes and reflecting them in the axes In the future unit pupils extend their knowledge of plotting coordinates by now plotting non-integer values.

In the prior unit pupils used knowledge of shape properties to draw, sketch and identify shapes. In this unit pupils will explain how to calculate the area of a parallelogram and a triangle. They will describe the relationship between scale factors and side lengths of two shapes. They will describe positions in all 4 quadrants drawing and translating simple shapes and reflecting them in the axes.

Area, perimeter, position and direction

If the area of a parallelogram is known, what formula could be used to work out the missing perpendicular height? 

If the area of a parallelogram is known, what formula could be used to work out the missing base? 

If the parallelogram has an area of 60 cm², what is the missing base? {{ }} cm.

If the parallelogram has an area of 240 cm², what is the missing perpendicular height? {{ }} cm.

If a parallelogram has an area of 48 cm² and a base of 8 cm, what is the missing perpendicular height? {{ }} cm.

If a parallelogram has an area of 48 cm² and a perpendicular height of 12 cm, what is the missing base? {{ }} cm.

A parallelogram has {{ }} pairs of equal side lengths.

What is the formula for the area of a parallelogram? Write the missing word.
Area = __________ × perpendicular height.

What is the area of the parallelogram? {{ }} cm².

A parallelogram has a base length of 7 cm and a perpendicular height of 6 cm. What is the area of the parallelogram? {{  }} cm².

This lesson will soon be taken down.

Use the area of a parallelogram formula to calculate unknown measurements

Lesson outcome