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Using triangle proportionality theorem to prove parallel lines

👉 Learn how to solve for the unknown in a triangle divided internally such that the division is parallel to one of the sides ...
YouTube on MSN

What is the triangle midsegment theorem?

👉 Learn how to solve for the unknown in a triangle divided internally such that the division is parallel to one of the sides of the triangle. The triangle proportionality theorem states that if a ...
BBC

Geometry and measure

Revise the different types of angles and rules for calculating angles. This guide includes interactive activities and a quiz. NEW: Angles in parallel lines Revise alternate, correspondent or ...
BBC

Higher – Calculations using the alternate segment theorem, tangents and chords

It is important to remember other angles rules, such as angles on a straight line add up to 180°, and to recognise angles in parallel lines. Make sure you are confident in applying Pythagoras’ theorem ...