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Geometry

General Polygons

Concept Quizzes

Perimeter
General Polygons - Angles
General Polygons - Area
Composite Figures - Solving with Algebra
Geometry Competition Warmup

Challenge Quizzes

General Polygons: Level 2 Challenges

Geometry Competition Warmup

The area of a right triangle is 30. One of the legs is 2 units more than 2 times the other. What is the hypotenuse of the triangle?

5 12 13 17

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by Brilliant Staff

Two equilateral triangles are aligned on top of one another to create a regular hexagon. If the area of the hexagon is 24, what is the area of one of the original equilateral triangles?

28 32 36 40

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by Brilliant Staff

Circle $O$ has point $X$ and point $Y$ on its circumference. If the radius of the circle is 6 and the measure of $XY$ is 10, what is the area of $\triangle{XOY}?$

4\sqrt{11}

5\sqrt{11}

6\sqrt{11}

3\sqrt{11}

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by Brilliant Staff

The ratio of acute angle $A$ to acute angle $B$ is 7 to 4. The complement of one angle is $15^\circ$ larger than the complement of the other. What is $A + B?$

55 66 99 110

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by Brilliant Staff

The diagonals of rectangle $ABCD$ meet at point $X.$ $\angle {DXC} = 120^\circ.$ If the shorter side of the rectangle measures 4 units, what is the perimeter of the rectangle?

24

4 + 8\sqrt{3}

8 + 8\sqrt{3}

8 + 4\sqrt{3}

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by Brilliant Staff

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