Every angle has a name based on how wide it opens. Drag the slider and watch the angle sweep from acute to reflex.
Try it: pass through 90° and 180° to see Right and Straight angles.
An angle is formed when two rays share a common starting point (the vertex), measured in degrees (°). Angles are named based on how wide they are.
Smaller than a right angle.
Exactly a quarter turn.
Wider than a right angle.
A perfectly flat line.
Wider than a straight angle.
Triangles can be classified by their sides or by their angles.
All three sides are different lengths.
Exactly two sides are equal.
All three sides are equal.
All three angles are less than 90°.
One angle is exactly 90°.
One angle is greater than 90°.
A polygon is a closed flat shape made of straight sides. Polygons are named based on how many sides they have.
Answer 3 out of 4 correctly to complete this quest and unlock Data Bay.
Tap a question to reveal its answer once you've tried it yourself.
Two 20-mark, 30-minute tests. Reveal answers question by question.