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OAR Math Skills: Geometry Flashcards

7 cards from real OAR practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 OAR Math Skills: Geometry flashcards as text

  1. A circle has a diameter of 14 cm. What is its area? (Use π ≈ 3.14)

    Answer: 153.86 cm²

    Radius = 7 cm; Area = π × r² = 3.14 × 49 = 153.86 cm².

  2. Two parallel lines are cut by a transversal. If one co-interior (same-side interior) angle is 65°, what is the other co-interior angle?

    Answer: 115°

    Co-interior angles are supplementary, so 180° − 65° = 115°.

  3. A rectangular prism has length 8 in, width 5 in, and height 3 in. What is its surface area?

    Answer: 158 in²

    SA = 2(lw + lh + wh) = 2(40 + 24 + 15) = 2(79) = 158 in².

  4. What is the length of the hypotenuse of a right triangle with legs of 9 and 12?

    Answer: 15

    c² = 9² + 12² = 81 + 144 = 225, so c = 15 (a 3-4-5 triple scaled by 3).

  5. The circumference of a circle is 31.4 m. What is its radius? (Use π ≈ 3.14)

    Answer: 5 m

    C = 2πr → r = C ÷ (2π) = 31.4 ÷ 6.28 = 5 m.

  6. A trapezoid has parallel bases of 10 ft and 6 ft, and a height of 4 ft. What is its area?

    Answer: 32 ft²

    Area = ½ × (b₁ + b₂) × h = ½ × 16 × 4 = 32 ft².

  7. An angle measures 137°. What is the measure of its supplement?

    Answer: 43°

    Supplementary angles sum to 180°; 180° − 137° = 43°.