Chapter 3

Question 1

What are corresponding angles?

Answer 1

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

Question 2

What are alternate angles?

Answer 2

On 2 parallel lines, angles on opposite lines and sides are equal eg

Angle d = angle a

----->----
   \a
    \
D  \
----->---

Question 3

What are interior angles?

Answer 3

When angles on 2 parallel lines add to make 180 eg
G+a=180
B+c=180

----------
G\b
    \
     \
   A \c
------------

Question 4

What is this line called?

____________
\
\

Answer 4

The transversal

Question 5

What do angles on s straight line add to?

Answer 5

180

Question 6

What’s is congruency?

Answer 6

Shapes are congruent if they are exactly the same shape and size

Question 7

What is SAS in congruent triangles?

Answer 7

SAS= side, angle, side (must be in that order)

Question 8

What’s is ASA in congruent triangles?

Answer 8

ASA=angle,side,angle

Question 9

What is AAS in congruent triangles?

Answer 9

AAS=angle, angle, side

Question 10

What is SSS in congruent triangles?

Answer 10

SSS=side,side,side

Question 11

What’s RHS in congruent triangles?

Answer 11

RHS= right angle, hypotenuse, side

Question 12

What is the equation for the sun of interior angles of any polygon?

Answer 12

(N-2)x180

N=number of sides in polygon

Question 13

What are the interior and exterior angles on a polygon?

Answer 13

they add to 180
A=interior
B=exterior
A+b=180

       /-----\
      /.          \
     /.            \
     \.            /
      \.          /
       \\_\_\_a_/_b\_\_\_\_

Question 14

What do ALL the EXTERIOR angles in a polygon add to?

Answer 14

360

Question 15

What is similarity?

Answer 15

They are the same shape(same angles) but different side lengths

Question 16

What are similar shapes multiplied or divided by?

Answer 16

The linear scale factor

Same for both shapes when comparing similarity

Question 17

What is the area scale factor?

Answer 17

Linear scale factor squared

Question 18

What is the volume scale factor?

Answer 18

Linear scale factor cubed

Question 19

What is the area scale factor equations?

Answer 19

Enlarged area=
Original area X linear scale factor

Original area=
Enlarged area divided by lsf^2

Lsf^2= enlarged area divided by original

Question 20

What is the volume scale factor equations?

Answer 20

Enlarged area= original area X lsf^3

Original area= Enlarged area divided by lsf^3

Lsf^3= enlarged area divided by original

Question 21

What is a bearing?

Answer 21

They are used to give a direction from a to b

Question 22

Bearings are always measured:

Answer 22

• clockwise
• from a north line
• using 3 figures eg 26degrees is 026degrees

Question 23

What is the difference of a bearing and reverse bearing?

Answer 23

180

Eg

Bearing. Reverse bearing
072. (+180 as below 180). 252
310 (-180 as bigger 180)130
:)