Revisiting area: Working out side lengths when given area

Maths

What is the height of a triangle with an area of 24 and a base of 8?

What is the base of a parallelogram with an area of 24 and a height of 3?

What is the height of a triangle with an area of 55 and a base of 11?

This trapezium has an area of 25. Given that a=6 and b=4. Work out the height of the trapezium.

This trapezium has an area of 30. Given that a=7 and h = 4. Work out the length of b.

Which of the following is larger than the area of a circle with a radius of 3cm?

Which of the following is larger than the area of a circle with a radius of 2cm?

Which of the following is smaller than the area of a circle with a radius of 4cm?

True or false: A circle with a radius of 1cm has a larger area than a rectangle with a base of 1cm and a height of 3cm.

True or false: A circle with a radius of 2cm has a larger area than a rectangle with a base of 2cm and a height of 6cm.