Angles
Vocabulary
Formulas
Polygons
Random!
100

Define an angle. 

What is: two rays connected by a vertex/endpoint?

100

What is an acute angle?

What is: an angle that is 1-89 degrees/an angle that is less than 90 degrees?

100

What is the formula for area of a circle?

What is: area = (pi) x (radius2) ?

100

Define equiangular.

What is: all angles are the same/congruent in a polygon. 

100

What is the formula for the area of a triangle?

What is: a = 1/2bh ?

200

True or false: complementary angles are three angles that add up to 90 degrees.

What is: complementary angles are TWO angles that add up to 90 degrees, not three?

200

Define adjacent angles. 

What is: two angles that share a common vertex and side?

200

True or false: you can not measure the perimeter of a circle.

What is: false; a circle's perimeter is called its circumference ?
200

True or false: In order for a polygon to be regular, it needs to be equilateral and equiangular. 

What is: true?

200

Define supplementary angles. 

What is: 2 angles that add up to 180 degrees?

300

Angle ABD and angle DBC are supplementary.

Angle ABD is 123 degrees.

Find the measure of angle DBC.

What is: 57 degrees?

300

True or false: equilateral means all sides are congruent. 

What is: true?

300

A rectangle has a length of 6 in. and a width of 8 in.

Find the area. (don't forget units!)


What is: 48 in.?

300

What is the name of a 10-sided polygon?

What is: a decagon?

300

What is the name of a polygon that has 26 sides?

What is: a 26-gon?

400

Angles DEG and angle GEF are supplementary.

Angle DEG is (18x - 9) degrees.

Angle GEF is (4x + 13) degrees.

Solve for x. 

What is: x = 8?

400

Define a concave polygon. 

What is: a polygon that is not convex; also called concave ?

400

A triangle has side lengths of 4 m (base), 9 m, and 10 m (height). 

Find the perimeter and area (don't forget units!).

What is: perimeter = 4 + 9 + 10 = 23 m

Area = 1/2 (4 m)(10 m) = 1/2 (40) = 20 m?

400
A regular pentagon has one side length that is 2x + 3. Another side length is 4x -11. 


Solve for x. 

What is: x = 7?

400

True or false: the diameter of a circle is 1/2 of the radius.

What is: false. The diameter is 2x the radius?

500

Angle ABD measures 154 degrees. Ray C is the bisector, splitting the angle into angles ABC and angle CBD.

What is the measure of each angle?

What is: 77 degrees?

500

Define perimeter.

What is: the distance around a figure?

500

A circle has a radius of 7.5 cm.

Find the area and circumference.

What is: a = (pi) x (7.5 cm2)

a = 176.63 cm2

c = 2 x (pi) x r

c = 2 x (pi) x (7.5 cm) = 47.1 cm

500

A regular octagon has side lengths AB and BC.

Side AB is 12 - 5x cm. 

Side BC is 4x + 39 cm. 

Solve for x and find the length of side AB.  

What is: x = -3; Side AB is 27 cm. 

500

What does an angle bisector do?

What is: splits an angle into two congruent angles?

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