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Equations Involving Brackets
Angles : Definition
Polygons
100
x = 17
5(x+3) - 4(2x-9) = 0 Find x
100
2 angles adding up to 180 degrees.
What are supplementary angles?
100
n = 17
The angle sum of the interior angles of an n-sided polygon is 2700 degrees. Find the value of n.
200
x = -0.4
1 - 4(2x+3) = 5(x-2) - 3(x-1) Find x
200
2 angles adding up to 90 degrees.
What are complementary angles?
200
n = 12
If each interior angle of an n-sided polygon is 150, find the value of n
300
x = 3
3x + 4 = 2x + 7
300
2 angles that share a common side and a common vertex but do not overlap are called adjacent angles.
What are adjacent angles?
300
144 degrees
Find the size of each interior angle of a regular decagon
400
x = 7/3
9(x+1) = 2(3x+8)
400
An angle lesser than 90 degrees.
What is an acute angle?
400
a) 720 b) 1080 c) 1800 d) 3240
Find the sum of the interior angles of the following polygons a) hexagon b) octagon c) dodecagon (12-sided) d) 20-gon
500
x = 4/3
7(x+2) = 2(2x+9)
500
An angle more than 90 degrees but less than 180 degrees.
What is an obtuse angle?
500
(n-2) x 180
What is the formula to find the interior angle of an n-sided polygon?