What is the third angle for the triangle where angle1 = 45° and angle2 = 45°?

30° 60° 90°

If a triangle has an angle of 90 degrees, what is it called?

acute angle obtuse angle right angle

What do you call a triangle whose all sides are equal?

equilateral isosceles scalene

If the diameter of a circle is 4cm, what is its radius? (Hint: diameter = 2 X radius)

8cm 2cm 6cm

What's the name of the type of maths that studies the sides and angles of triangles?

geometry trigonometry geography