Angles you can handle.
Geometry with the school-test pressure taken out.
Ten questions, with the answers explained. Try them in your head, then open each answer when you're ready.
Play this quiz →QUESTION 1 / 10
How many sides does a hexagon have?
- Six
- Seven
- Eight
- Five
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Six
Hex means six, so a hexagon has six sides.
QUESTION 2 / 10
What is an angle of exactly 90 degrees called?
- An obtuse angle
- A reflex angle
- An acute angle
- A right angle
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A right angle
A right angle measures 90 degrees, like the corner of a square.
QUESTION 3 / 10
How many degrees are in a full turn?
- 90
- 180
- 270
- 360
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360
A full rotation brings you back to the same direction and measures 360 degrees.
QUESTION 4 / 10
What is a line segment from a circle's center to its edge called?
- Radius
- Diameter
- Chord
- Tangent
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Radius
A radius joins the center to the circumference. A diameter is twice as long.
QUESTION 5 / 10
What is a triangle with three equal sides called?
- Obtuse
- Equilateral
- Scalene
- Isosceles with exactly two equal sides
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Equilateral
An equilateral triangle has three equal sides and three 60-degree angles.
QUESTION 6 / 10
How many faces does a cube have?
- Eight
- Four
- Twelve
- Six
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Six
A cube has six square faces, twelve edges, and eight vertices.
QUESTION 7 / 10
What is the sum of interior angles in a Euclidean triangle?
- 90 degrees
- 360 degrees
- 180 degrees
- 270 degrees
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180 degrees
In flat Euclidean geometry, a triangle's three interior angles add to 180 degrees.
QUESTION 8 / 10
Which shape has exactly one pair of parallel sides under the exclusive definition?
- Rhombus
- Parallelogram
- Square
- Trapezoid
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Trapezoid
Under the exclusive definition, a trapezoid has exactly one pair of parallel sides.
QUESTION 9 / 10
What is the longest side of a right triangle called?
- Radius
- Chord
- Hypotenuse
- Median
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Hypotenuse
The hypotenuse lies opposite the right angle.
QUESTION 10 / 10
How many sides does a decagon have?
- Eight
- Ten
- Twelve
- Nine
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Ten
A decagon has ten sides. An octagon has eight.