Chapter 3 Flashcards
What are corresponding angles?
They are equal to each other, on 2 parallel lines the angles in each equivalent place is equal. Eg
S=a
D=m etc.
S\ j --\---->----- D \c \ A\o -----\-->----- M \g
What are alternate angles?
On 2 parallel lines, angles on opposite lines and sides are equal eg
Angle d = angle a
----->---- \a \ D \ ----->---
What are interior angles?
When angles on 2 parallel lines add to make 180 eg
G+a=180
B+c=180
---------- G\b \ \ A \c ------------
What is this line called?
____________
\
\
The transversal
What do angles on s straight line add to?
180
What’s is congruency?
Shapes are congruent if they are exactly the same shape and size
What is SAS in congruent triangles?
SAS= side, angle, side (must be in that order)
What’s is ASA in congruent triangles?
ASA=angle,side,angle
What is AAS in congruent triangles?
AAS=angle, angle, side
What is SSS in congruent triangles?
SSS=side,side,side
What’s RHS in congruent triangles?
RHS= right angle, hypotenuse, side
What is the equation for the sun of interior angles of any polygon?
(N-2)x180
N=number of sides in polygon
What are the interior and exterior angles on a polygon?
they add to 180
A=interior
B=exterior
A+b=180
/-----\ /. \ /. \ \. / \. / \\_\_\_a_/_b\_\_\_\_
What do ALL the EXTERIOR angles in a polygon add to?
360
What is similarity?
They are the same shape(same angles) but different side lengths