YouTube on MSNOpinion

How does the Pythagorean inequality theorem prove obtuse triangles

Learn about the Pythagorean theorem. The Pythagoras theorem is a fundamental relation among the three sides of a right ...
YouTube on MSNOpinion

Determine the sides of a triangle produce an acute, obtuse or right triangle

Learn about the Pythagorean theorem. The Pythagoras theorem is a fundamental relation among the three sides of a right ...
BBC

Finding angles in right-angled triangles

Trigonometry close trigonometryThe study of sides and angles in triangles. can be used to find a missing angle in a right-angled triangle when two sides are known. An understanding of the three ...
BBC

Angles in triangles and quadrilaterals

Interior angles in a triangle add up to 180˚. Triangles close triangleA polygon with three straight sides. have three sides, therefore they have three angles. Interior angles in a triangle sum to a ...