Perimeter and circumference
What represents perimeter, the amount of grass that a cow can eat or the fence that keeps her inside?
The fence is a better representation of perimeter.
What is the area of a rectangle with length 10 cm and width 3 cm?
Answer: 30 cm²
What is the area of a circle with radius 3 cm? Use π = 3.14.
Answer: 28.26 cm²
A shape is made of two rectangles side by side: one is 4 cm × 3 cm and the other is 4 cm × 5 cm. What is the total area?
Answer: 32 cm²
How many sides does a heptagon have?
7 sides
A square has sides of 9 cm. What is its perimeter?
Answer: 36 cm
Find the area of a triangle with a base of 8 cm and a height of 5 cm.
Answer: 20 cm²
Find the area of a circle with a diameter of 10 cm. Use
pi = 3.14.
Answer: 78.5 cm²
A rectangular garden is 8 m by 6 m, with a 2 m by 2 m shed in one corner. What is the area not covered by the shed?
Answer: 44 m²
What is the only even prime number?
2
Find the circumference of a circle with a radius of 5 cm. Use π = 3.14.
Answer: 31.4 cm
A parallelogram has a base of 12 cm and a height of 7 cm. What is its area?
Answer: 84 cm²
A sector has a radius of 6 cm and covers ¼ of a circle. What is its area? Use π = 3.14.
Answer: 28.26 cm²
A composite shape is made of a semicircle on top of a 6 cm by 4 cm rectangle. The diameter of the semicircle matches the 6 cm side. What is the total area? Use π = 3.14.
Answer: 38.42 cm²
What is 15% of 200?
30
A triangle has side lengths 7 cm, 12 cm, and 13 cm. What is its perimeter?
Answer: 32 cm
The area of a rhombus is 48 cm² and its base is 6 cm. What is its height?
Answer: 8 cm
A circle has an area of 50.24 cm². What is its radius? Use π = 3.14.
Answer: 4 cm
A shape is made by attaching a triangle (base 6 cm, height 4 cm) to the top of a square with side length 6 cm. What is the total area?
Answer: 48 cm²
If 3x + 5 = 20, what is x?
5
A half circle has a straight edge measuring 18 cm. What is its perimeter? Use π = 3.14.
3.14 x 18 / 2 = 28.26cm
Perimeter = curved side plus straight edge
Perimeter = 28.26+18= 46.26cm
A trapezium has parallel sides of 10 cm and 6 cm, and a height of 5 cm. What is its area?
Answer: 40 cm²
A 60° sector has a radius of 10 cm. What is its area? Use π = 3.14.
Answer: 52.33 cm²
A rectangle (10 cm × 8 cm) has a semicircle cut out of one of the 10 cm sides. The semicircle’s diameter is 10 cm. What is the remaining area? Use π = 3.14.
Answer: 48.6 cm²
In a bag of 24 lollies, ⅜ of them are red. How many red lollies are there?
9