Chapter 3 Flashcards

1
Q

What are corresponding angles?

A

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
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are alternate angles?

A

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

Angle d = angle a

----->----
   \a
    \
D  \
----->---
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are interior angles?

A

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

----------
G\b
    \
     \
   A \c
------------
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is this line called?

____________
\
\

A

The transversal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What do angles on s straight line add to?

A

180

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What’s is congruency?

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is SAS in congruent triangles?

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What’s is ASA in congruent triangles?

A

ASA=angle,side,angle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is AAS in congruent triangles?

A

AAS=angle, angle, side

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is SSS in congruent triangles?

A

SSS=side,side,side

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What’s RHS in congruent triangles?

A

RHS= right angle, hypotenuse, side

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

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

A

(N-2)x180

N=number of sides in polygon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are the interior and exterior angles on a polygon?

A

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

       /-----\
      /.          \
     /.            \
     \.            /
      \.          /
       \\_\_\_a_/_b\_\_\_\_
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

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

A

360

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is similarity?

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are similar shapes multiplied or divided by?

A

The linear scale factor

Same for both shapes when comparing similarity

17
Q

What is the area scale factor?

A

Linear scale factor squared

18
Q

What is the volume scale factor?

A

Linear scale factor cubed

19
Q

What is the area scale factor equations?

A

Enlarged area=
Original area X linear scale factor

Original area=
Enlarged area divided by lsf^2

Lsf^2= enlarged area divided by original

20
Q

What is the volume scale factor equations?

A

Enlarged area= original area X lsf^3

Original area= Enlarged area divided by lsf^3

Lsf^3= enlarged area divided by original

21
Q

What is a bearing?

A

They are used to give a direction from a to b

22
Q

Bearings are always measured:

A
  • clockwise
  • from a north line
  • using 3 figures eg 26degrees is 026degrees
23
Q

What is the difference of a bearing and reverse bearing?

A

180

Eg

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