|Class 6 Maths Basic Geometrical Ideas||Triangles|
A three-sided polygon is termed as a triangle. Below is the image of a triangle ABC.
A triangle is denoted by △
Triangle has three sides (line segments) AB, BC, CA
Triangle has three angles, ∠ACB, ∠CAB, ∠ABC
Triangle has three vertices, A, B, C
Triangle being a closed curve, has three regions; interior, exterior and boundary.
Question: In the given figure:
△ ABC, △ ABD and △ ADC
∠ABD, ∠ADB, ∠BAD, ∠ADC, ∠DAC, ∠DCA and ∠BAC
AB, AD, BD, AC, DC and BC
△ ABC and △ ABD has ∠B as common.