Question

Define similar triangle. State Basic Proportionality theoram.

Answer 1

Two triangle are similar if
1)there corresponding angles are equal
2)there corresponding sides are in same ration

If a line parallel to the one side of a triangle, bisected other two sides of triangle in same ration

Answer 2

In the triangles the sum of all angles are 180°
In the right triangle one angle should be 90° and sum of other 2 angles are 90°
In an isosceles triangle 2 sides are equal and the angles intersected by the two lines are also equal