DCAS DCAS Geometry and Measurement 1 — Questions and Answers
Question 1: What is the area of a rectangle with a length of 12 cm and a width of 5 cm?
- 60 cm² (Correct answer)
- 34 cm²
- 17 cm²
- 120 cm²
Correct answer: 60 cm²
The area of a rectangle is calculated by multiplying length × width, so 12 × 5 = 60 cm².
Question 2: Which of the following best describes a right angle?
- An angle that measures exactly 90° (Correct answer)
- An angle that measures exactly 180°
- An angle less than 90°
- An angle greater than 90°
Correct answer: An angle that measures exactly 90°
A right angle measures exactly 90° and is commonly shown with a small square in the corner.
Question 3: A triangle has sides measuring 3 cm, 4 cm, and 5 cm. What type of triangle is this?
- Right triangle (Correct answer)
- Equilateral triangle
- Obtuse triangle
- Isosceles triangle
Correct answer: Right triangle
A 3-4-5 triangle satisfies the Pythagorean theorem (3² + 4² = 5²), making it a right triangle.
Question 4: What is the perimeter of a square with a side length of 7 inches?
- 28 inches (Correct answer)
- 14 inches
- 49 inches
- 21 inches
Correct answer: 28 inches
The perimeter of a square is 4 × side length, so 4 × 7 = 28 inches.
Question 5: How many degrees are in a straight angle?
- 180° (Correct answer)
- 90°
- 360°
- 270°
Correct answer: 180°
A straight angle forms a straight line and always measures exactly 180°.
Question 6: What is the volume of a rectangular prism that is 4 cm long, 3 cm wide, and 5 cm tall?
- 60 cm³ (Correct answer)
- 47 cm³
- 24 cm³
- 94 cm³
Correct answer: 60 cm³
Volume of a rectangular prism = length × width × height = 4 × 3 × 5 = 60 cm³.
DCAS DCAS Geometry and Measurement 1
What is the area of a rectangle with a length of 12 cm and a width of 5 cm?