Area and perimeter of composite figure

What's the name of the shaded part?

• Boomerang

• Hat

• Sandwich

• Triangle

What are the basic shapes used to make this composite figure?

• Rectangle and quarter circle

• Rectangle and semicircle

• Square and quarter circle

• Square and semicircle

What's the name of the shaded part?

• Hat

• Half-leaf

• Leaf

• Semicircle

What are the basic shapes used to make this composite figure?

• Semicircle and square

• Semicircle and right-angled triangle

• Quarter circle and square

• Quarter circle and isosceles triangle

What's the name of the shaded part?

• Biscuit

• Curved square

• Pokemon

• 4-point star

Each quarter circle has a diameter of 20 cm. How can you find the area of the shaded part? (Take $\pi$ = 3.14.) 

• (20 x 20) - (3.14 x 10 x 10)

• (20 x 20) - (3.14 x 20 x 20)

• (3.14 x 10 x 10) - (20 x 20)

• (3.14 x 20 x 20) - (20 x 20)

How do you find the area of the shaded figure?

• Area of square - Area of semicircle

• Area of quarter circle - Area of semicircle

• Area of semicircle - Area of quarter circle

• Area of square - Area of semicircle - Area of quarter circle

The figure is made up of a quarter circle and a semicircle. What is the perimeter? (Take  $\pi$  = 3.14.)

The figure shows 4 quarter circles in a square. What is the perimeter of the shaded figure? (Take  $\pi$  = 3.14.)

The figure shows a quarter circle and an equilateral triangle. What is the perimeter of the shaded part? (Take  $\pi$  = 3.14.)