Maths 6_2 Maths Geometry Questions 01

$$\angle\ CDB\ =\ 180\degree\ -\ 109\degree$$  Angles on a straight line all add together to make 180°

$$\angle\ CDB\ =\ 180\degree\ -\ 109\degree$$  Angles on 3 lines all add together to make 180°

$$\angle\ CDB\ =\ 180\degree\ -\ 109\degree$$ Angles of a triangle all add together to make 180°

$$\angle\ CDB\ =\ 180\degree\ -\ 109\degree$$ Angles on a straight line all subtracted together to make 180°

x = 360-70-100-115

= $$75\degree$$  

Angles around a point all add together to make 360°

x = 360-70+100-115

= $$75\degree$$  

Angles around a point all add together to make 360°

x = 360-(70-100-115)

= $$75\degree$$  

Angles around a point all add together to make 360°

x = 360-70-100-115

= $$75\degree$$  

Angles around a point all add together to make 306°

y = 180 - 61 - 61

Base angles in an isosceles triangle are equal and angles in a triangle add up to 180°

y = 360 - 61 - 61

Base angles in an isosceles triangle are equal and angles in a triangle add up to 360°

y = 180 - 61

Base angles in an isosceles triangle are equal and angles in a triangle add up to 180°

y = 61

Base angles in an isosceles triangle are equal and angles in a triangle add up to 180°

$$x+x+55\degree\ =\ 180\degree$$  

$$2x\ =\ 180\degree\ -\ 55\degree\ =125\degree$$  

$$x\ =\ \frac{125}{2}\ =\ 62.5\degree$$  

Base angles in an isosceles triangle are equal and angles in a triangle add up to 180°

$$x+x+55\degree\ =\ 180\degree$$  

$$2x\ =\ 180\degree\ -\ 55\degree\ =125\degree$$  

$$x\ =\ \frac{125}{2}\ =\ 62\degree$$  

Base angles in an isosceles triangle are equal and angles in a triangle add up to 180°

$$x+x+55\degree\ =\ 180\degree$$  

$$2x\ =\ 180\degree\ -\ 55\degree\ =125\degree$$  

$$x\ =\ \frac{125}{2}\ =\ 62.5\degree$$  

Base angles in an isosceles triangle are NOT equal and angles in a triangle add up to 180°