Shapes and Geometry

1. How many angles does a triangle have?

• A. 2
• B. 3 ✓
• C. 4
• D. 5

💡 A triangle has exactly 3 angles. The sum of all three angles always equals 180 degrees.

2. How many right angles does a rectangle have?

• A. 2
• B. 3
• C. 4 ✓
• D. 5

💡 A rectangle has 4 right angles (90°) at each of its four corners.

3. How many degrees are in a straight line?

• A. 90
• B. 120
• C. 150
• D. 180 ✓

💡 A straight line (straight angle) measures exactly 180 degrees.

4. What is the perimeter of a square with side length 6?

• A. 18
• B. 20
• C. 24 ✓
• D. 28

💡 Perimeter of square = 4 × side = 4 × 6 = 24 units.

5. How many sides does a pentagon have?

• A. 4
• B. 5 ✓
• C. 6
• D. 7

💡 A pentagon has 5 sides. The prefix "penta" comes from Greek meaning five.

6. What is the area of a rectangle with length 8 and width 5?

• A. 30
• B. 35
• C. 40 ✓
• D. 45

💡 Area of rectangle = length × width = 8 × 5 = 40 square units.

7. How many sides does a hexagon have?

• A. 4
• B. 5
• C. 6 ✓
• D. 7

💡 A hexagon has 6 sides. The prefix "hex" comes from Greek meaning six.

8. What is the area of a square with side 7?

• A. 42
• B. 47
• C. 49 ✓
• D. 56

💡 Area of square = side × side = 7 × 7 = 49 square units.

9. What is the circumference formula of a circle?

• A. πr²
• B. 2πr ✓
• C. πd²
• D. r²π

💡 The circumference (perimeter) of a circle = 2πr, where r is the radius.

10. How many degrees are in a right angle?

• A. 45
• B. 60
• C. 90 ✓
• D. 180

💡 A right angle is exactly 90 degrees, shown by a small square in the corner.