FEATURES OF TRIANGLES

2. How many sides have a triangle?

3. 3

4. What is formulae for finding the area of a triangle?

5. A=1/2bh

6. How many sides have a rectangle?

7. 4

8. What is formulae for finding the area of a triangle?

9. A=lb

11. D F C
A E
B

12. What is the area of rectangle ABCD?

13. A =AB*AD

14. What is the area of triangle
ABF?

15. A =1/2 AB*FE

16. What is relation between FE and AD?

17. AD=FE

18. What is the relation between area of triangle
ABF and area of rectangle ABCD?

19. Area of ABCD=1/2 Area of ABF

20. Area of the rectangle is double, the area of
triangle obtained by the two vertices on the side
of rectangle and third vertex is on the opposite
side.

21. D C
A B
P
F

22. What is the area of rectangle ABCD?

23. A=AB*AD

24. What is the area of triangle ABF?

25. A=1/2 AB*PF

26. What is the relation between AD and PF?

27. AD = PF

28. What is the relation between area of triangle
ABF and area of rectangle ABCD?

29. Area of ABCD=1/2Area of ABF

30. Area of a rectangle is double, the
area of a triangle obtained by the
two vertices on side of the
rectangle and third vertex is on the
extended opposite side.

31. P Q R S
C A D F B G

32. What is the area of triangle ABP?

33. A=1/2 AB*PC

34. What is the area of triangle ABQ?

35. A=1/2 AB*QD

36. What is the area of triangle ABR?

37. A=1/2 AB*RF

38. What is the area of triangle ABS?

39. A=1/2 AB*SG

40. What is the relation between PC,QD,RF and SG?

41. These sides are equal.

42. What is the relation between area of
triangle ABP,ABQ,ABR,and ABS?

43. These are equal.

44. Triangles with the same base
and between the same
parallels are of equal area

45. Can you draw a triangle with same
area as the triangle ABC shown
below but with the angle at A, a right
angle?
A
C
B

46. The area of the triangle between same
parallel lines and have same base are ----------
Find the vertices of the triangle that
have half of the area of a rectangle?
The distance between parallel line are -------
every time

47. AB=5cm, BC=7cm, angle
ABC=60. Draw the triangle ABC.
Draw another triangle with same
area.

48. AB= 4cm, BC= 5cm, CA= 6cm.
Draw the triangle ABC. Draw an
isosceles triangle with same area
as ABC.