size of angle $$\text{ }d$$° - 

154°

size of angle $$\text{ }e$$° - 

26°

justification for size of angle $$d$$ - 

angles about a point on a straight line sum to 180°

justification for size of angle $$e$$° - 

vertically opposite angles are equal

not an angle on this diagram - 

52°

size of angle $$\text{ }g$$° - 

78°

size of angle $$\text{ }h$$° - 

24°

justification for angle $$g$$° - 

half of the angle that is vertically opposite 156°

justification for angle $$h$$° - 

angles about a point on a straight line sum to 180°

not a complete justification - 

vertically opposite angles are equal

not angle $$\text{ }g° \text{or }h°$$ - 

156°

isosceles - 

another angle of 40° and one 100°

scalene - 

one angle of 82° and another of 58°

right-angled scalene - 

an angle of 90° and one of 50°

equilateral - 

impossible to have this triangle with an angle of 40°

linear path A - 

ray

linear path B - 

line

linear path C - 

line segment

∠CAD - 

$$b$$°

∠EAD - 

$$c$$°

∠BAC - 

$$a$$°

∠BAD - 

$$(a + b)$$°

∠HFI - 

87°

∠GFI - 

155°

∠HFJ - 

179°

∠GFJ - 

113°

reflex ∠GFJ - 

247°

acute - 

∠MKN

right angle - 

∠LKP

obtuse - 

∠MKP

reflex - 

100° + $$\theta$$°

CD - 

Line segment parallel to BF

EF - 

Line segment perpendicular to CD

BG - 

Line segment with a length of 5 units

EG - 

Line segment parallel to AB