radiuses are equal and they form isosceles triangles.
Tag: angles
3.9 sum of angles
not asking for specific, individual angles but the sum of angles.
3.8 trapeziums
angles between parallel lines add up to 180 deg.
3.7 rhombuses
key thing about this: 4 equal sides, 2 isosceles triangles!
3.6 parallelograms
a very popularly-tested 4-sided figure.
3.5 squares and rectangles
working with right-angled corners and parallel lines!
3.4 exterior angle of triangle
a special property that is an awesome shortcut that saves many steps!
3.3 triangles
sum of angles in triangles=180 degrees.
3.2 at a point
Angles around a point form a circle which forms 360 degrees.
3.1 on a straight line
angles on a straight line add up to 180 degrees