1) Angles in a triangle add up to 180 degrees. 2) The angle formed by two lines intersecting at an external point is equal to the sum of the interior angles on the same side of the intersecting lines. 3) In a triangle, the angle formed by two sides is called the angle opposite to the third side.

2. ka-`m-Pn-IÄ

3. A
B P C
Nn{X-¯n AB = AC
A bn n¶pw BC bnte¡pÅ ew_-amWv AP
Ct¸mÄ In«nb cv {XntIm-W-§-fnÂ
 BAP =  CAP BWv

4. Hcp ka-]mÀiz-{Xn-tIm-W-¯nÂ
Xpey-h-i-§Ä tNcp¶ aqe-bn n¶v FXnÀh-i-t
¯-¡pÅ ew_w, Cu hi-t¯bpw Cu aqe-bn-epÅ
tImWn-sbpw ka-`mKw sN¿p-¶p. Hcp hc-sbtbmtImWn-
ttbmka-`mKw sN¿p¶ hcbv¡v
ka-`mPn F¶p ]d-bp¶p

5. A B
A B
A B

6. AB F¶ hchc¨v AXnv ew_ka`mPn hc-bv¡pI
A B

7. A B

8. A
B C
A
P
Q
B
C

9. B
P
Q
A
C

10. Thank You