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Lesson 3: Area of Triangles — Practice Questions

  1. 1. A triangle has an area of $24 \text{ cm}^2$ and a base of $8 \text{ cm}$. What is its height in cm? ___

  2. 2. The area of a triangle is $50 \text{ m}^2$ and its height is $5 \text{ m}$. What is the length of its base?

    • A. $10 \text{ m}$
    • B. $20 \text{ m}$
    • C. $25 \text{ m}$
    • D. $125 \text{ m}$
  3. 3. The area of a triangular garden plot is $36 \text{ square yards}$. If the height is $6 \text{ yards}$, what is the base of the plot in yards? ___

  4. 4. A triangular flag has an area of $75 \text{ in}^2$ and a base of $15 \text{ in}$. What is the height of the flag in inches? ___

  5. 5. A piece of fabric is shaped like a triangle with an area of $99 \text{ square inches}$. If its base measures $18 \text{ inches}$, what is its height in inches? ___

  6. 6. A right triangle has legs that measure 6 meters and 10 meters. What is the area of the triangle in square meters? ___

  7. 7. A triangular garden plot has a base of 50 feet and a height of 30 feet. What is the total area of the garden plot?

    • A. 750 square feet
    • B. 1500 square feet
    • C. 80 square feet
    • D. 40 square feet
  8. 8. A triangular flag has an area of 36 square inches and a height of 8 inches. What is the length of its base in inches? ___

  9. 9. A parallelogram has an area of 80 square centimeters. If a triangle has the same base and height as the parallelogram, what is the area of the triangle?

    • A. 40 square centimeters
    • B. 80 square centimeters
    • C. 160 square centimeters
    • D. 20 square centimeters
  10. 10. A stained glass artist cuts a triangular piece of glass with a base of 12 cm and a corresponding height of 9 cm. What is the area of the piece in square cm? ___