Vocabulary True or False Formulas Angle Types Calculations
100
Semi-Circle
What is half a circle called?
100
True
if a, b and c are sides of a right angled triangle;
a^2 + b^2 = c^2
100
a^2 + b^2 = c^2
What is the Pythagoras Theorem?
100
An Obtuse Angle
What is an angle whose measure is greater than 90° and less than 180°?
100
50.4 cm
Calculate the circumference of a circle with a 8 cm radius.
200
Tangent
What is a line that touches the circle in one point only called?
200
True
Equilateral triangles have all three sides equal.
Isoceles triangles have two equal sides.
Scalene triangles consist of three different side lengths.
200
(n-2) x 180 = total interior angles
What is the formula used to find the total interior angles of a polygon?
200
Corresponding Angles
What type of angles are created where a transversal crosses other (usually parallel) lines and the angles are the ones at the same location at each intersection?
200
13.1 cm
The length of an arc of a circle if the radius is 12.5 cm and the angle at the centre is 60°.
300
Diameter
What is any chord passing through the center of a circle called?
300
True
The line drawn from the center of a circle at right angles to a chord, bisects the chord.
300
(a:b)^3
If the ratio used for line lengths of two trianlges is a:b what would the ratio for the volume be?
300
A Reflex Angle
What is an angle whose measure is greater than 180° and less than 360°?
300
15.9 cm
Find the radius of a circle with the circumference 1.
400
Circle
What is the set of points that are all equidistant to one point called?
400
True
Similiar shapes are equiangular.
400
If a^2 + b^2 = c^2, the triangle is right angled.
If the original of a theorem states;
If a triangle is right angled, it is a^2 + b^2 = c^2
What would the converse be?
400
Adjacent Angles
What type of angles share a common side and a common vertex, but do not overlap?
400
23.9°
Find the angle of a sector with area 30 cm^2 and radius 12 cm.
500
Chord
What is a line segment joining two parts of a circle called?
500
False
If there were four angles; A, B, C and D
A and B were supplementary
C and D were supplementary
A, B, C and D all are on line segment EF
All four of the angles would make a complementary angle.
500
A = (θ/360°) × (π r)^2
What is the formula used to calculate the area of a sector?
500
Alternate Exterior Angles
What type of angles are created where a transversal crosses two (usually parallel) lines and each pair of these angles are outside the parallel lines, and on opposite sides of the transversal.
500
20.9 cm
The second hand of a clock is 10 cm long. How far does the tip of the second hand travel in 20 seconds?






Geometry By Dilara Koz

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