Vocabulary
A 90° angle is called this.
A right angle
The Ancient Greek mathematician credited with this famous theorem.
Pythagoras
Write the formula for finding the hypotenuse when the short sides are 3 and 4
3² + 4² = hyp²
What is the side called that is opposite the right angle?
hypotenuse
4 × 4 = ?
16
The longest side of a right-angled triangle, always opposite the right angle.
The hypotenuse
The type of triangle Pythagoras' theorem can be used on.
A right-angled triangle
3² + 4² =
25
What is the name of the symbol we use to mark an unknown angle? Is it Alpha, Beta, Theta or Zeta.
Theta
6 × 6 = ?
36
An angle exactly equal to 180°
Straight angle
The formula for Pythagoras' theorem, in terms of a, b and c. Where a and b are the short sides and c is the hypotenuse.
a² + b² = c²
When finding the hypotenuse, what is the next step?
3² + 4² = hyp²
3² + 4² = 25
Find the square root of 25
What are the names of the sides of a right angled triangle when using trigonometry.
Hypotenuse, Adjacent and Opposite
12 × 12 = ?
144
The name for a triangle with two sides (and two angles) equal.
An isosceles triangle
In the formula a² + b² = c², what does c represent?
The hypotenuse (longest side)
When finding an unknown side, do you add of subtract the known sides squared?
Subtract
The side directly across from the angle you're working with is called this (not the hypotenuse).
The opposite side
√81 = ?
9
An angle that is more than 90° but less than 180° is called this.
An obtuse angle
True or false: Pythagoras' theorem works on any triangle, not just right-angled ones.
False.
Right-angled triangles only
A 10 m ladder leans against a wall. Its base sits 6 m from the wall. How high up the wall does it reach?
8 m
What is Trig short for?
Trigonometry
6² + 4² = ?
50