BBC2 年
How to show the angles in a triangle add up to 180 degrees
Image caption, ...and draw another diagonal line to join the points and mark the angles inside the triangle. Use the scissors to cut the triangle out. STEP 4: Place two of the triangles along the ...
BBC1 年
Finding the length of a side in a right-angled triangle
Trigonometry can be used to find the length of a side in a triangle. Trigonometry close trigonometryThe study of sides and angles in triangles. can be used to find a missing side in a right-angled ...