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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 triangle has angles measuring 45° and 75°. What is the measure of the third angle?

    Answer: 60°

    The interior angles of a triangle sum to 180°; 180° − 45° − 75° = 60°.

  2. A cylinder has radius 3 cm and height 10 cm. What is its volume? (Use π ≈ 3.14)

    Answer: 282.6 cm³

    V = π × r² × h = 3.14 × 9 × 10 = 282.6 cm³.

  3. Which of the following best describes a rhombus?

    Answer: A parallelogram with all four sides equal

    A rhombus is a parallelogram where all four sides are congruent, but angles need not be 90°.

  4. Point A is at (2, 3) and Point B is at (−2, 6). What is the distance AB?

    Answer: 5

    d = √[(−2−2)² + (6−3)²] = √[16 + 9] = √25 = 5.

  5. A square has a diagonal of 8√2 inches. What is the side length of the square?

    Answer: 8 in

    For a square with side s, diagonal = s√2; s = (8√2) ÷ √2 = 8 in.

  6. Two angles are vertical angles. One measures 3x + 10 degrees and the other measures 5x − 20 degrees. What is x?

    Answer: 15

    Vertical angles are equal: 3x + 10 = 5x − 20 → 30 = 2x → x = 15.

  7. A rectangular room is 12 ft by 15 ft. If you want to place tiles that are each 1.5 ft × 1.5 ft, how many tiles do you need?

    Answer: 80

    Room area = 180 ft²; tile area = 2.25 ft²; tiles = 180 ÷ 2.25 = 80.