maths Dr Clubb- angles

angles that add up to 90°

complimentary

angles that add up to 180°

suplimentary

angles on the opposite side of eachother are….

equal

angles at a round point always add up to

360°

what is this

a vertex

what is the definition of a vertex

where two lines meet

how would you write this angle down

∠ABC

in this image what is the angle of intrest

B

when writing down the name of your angle where should the point of intreset be

in the middle of your angle name

what cap case does your angle name need to be in

upper case

-plural for vertex

vertesies

acute angle

less that 90 degrees

right anlge

exactly 90 degrees

obtuse angle

90 and 180

straight

180 exact

reflex

over 180 less than 360

what number is it’s own compliment

45 because 45 plus 45 equals 90 = a compliment