Everything Maths Grade 10

In△CBA:

B^+A^+ ^y= 180° (sum of\s in△)

90 °+ 55°+ ^y= 180°

)y^= 35°

△CDE△CBA (proved)

)CE=CA

)z= 5

Exercise 7 – 2:

1.Calculate the unknown variables in each of the following figures.

a)

N

P O

36 ◦

x

y

b) N

P O

x

30 ◦

68 ◦

c)

N

P O

y

68 ◦

x

68 ◦

248 7.2. Triangles