Geometry Basics

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What is the sum of the angles in a triangle?
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180 degrees.
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What is a four-sided shape called?
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Quadrilateral.
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What do you call a triangle with all sides of equal length?
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Equilateral triangle.
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What is the name of a polygon with eight sides?
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Octagon.
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What do you call a straight path that extends infinitely in both directions?
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A line.
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What is the perimeter of a square with side length 5?
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20 units.
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What is the formula for the area of a rectangle?
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Length × Width.
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What do we call a line segment that joins two points on a circle?
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A chord.
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What is a shape with all sides and angles equal called?
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A regular polygon.
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If a rectangle is 4 units long and 3 units wide, what is its area?
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12 square units.
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What is a triangle with one right angle called?
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Right triangle.
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What is the term for a closed shape with no sides that are equal and no angles that are equal?
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A scalene triangle.
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What is the radius of a circle if its diameter is 10?
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5 units.
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What is pi approximately equal to?
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3.14.
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What geometric shape has opposite sides that are equal and parallel?
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A parallelogram.
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