What is the missing number on a straight line if I have an angle equalling 90°?
90°
This triangle has a 90° angle in it.
Right Angle Triangle
This shape has four equal sides and angles.
Square
Two angles of the trapezium are 90° and the third is 80°, how many degrees is the last angle?
360-90-90=360-180=180
180-80=100°
Which of the four angles can be spotted by drawing a C shape?
What is the missing number on a straight line if I have an angle equalling 45°?
135°
Each angle in this triangle is equal.
Equilateral
This shape is often used when flying a piece of material connected by string to a reel.
Kite
Two angles of the trapezium are 90° and the third is 30°, how many degrees is the last angle?
360-90-90=360-180=180
180-30=150°
When two lines met creating a central point, what angles are on opposite sides of the intersecting lines?
Vertically Opposite Angles
What is the missing number on a straight line if I have an angle equalling 168°?
12°
This equals up to 180°.
Triangles
This shape has two pairs of parallel lines, equal sides and one pair of obtuse angles and one pair of acute angles.
Rhombus
Two angles of the trapezium are 90° and the third is 120°, how many degrees is the last angle?
360-90-90=360-180=180
180-120=60°
What angle occurs between two parallel lines on the same side of the transversal line?
Co-interior angles
What is the missing number on a straight line if I have an angle equalling 67°?
113°
Each side of this triangle is different.
Scalene
This shape has two pairs of parallel lines and one pair of obtuse angles and one pair of acute angles.
Parallel
A trapezium has three angles of 190°, 70° and 60°. How many degrees is the last angle?
360-190-70-60=40°
Which angles are formed on the same side of the transversal line but are located on opposite parallel lines?
Corresponding
What is the missing number on a straight line if I have an angle equalling 96°?
84°
Two angles of this triangle are 70°.
Isosceles
This shape has one pair of parallel sides.
Trapezium
A trapezium has three angles of 168°, 23° and 52°. How many degrees is the last angle?
360-168-23-52=117°
Which angle is on the opposite sides of the transversal line but are equal in the amount of degrees?
Alternate