CHAPTER 7

Question 0

Congruent triangle tests?

Answer 0

Congruent = - (x 3)
Tests = (SSS), (SAS), (AAS), (RHS)

Question 1

Types of angles?

Answer 1

Acute = below 90 but above 0
Right = 90
Obtuse = above 90 but below 180
Straight = 180
Reflex = above 180 below 360
Revolution = 360
Complementary angle sums to = 90
Supplementary angle sums to = 180

Question 2

Similar triangle tests?

Answer 2

1) two pairs of equal matching angles
2) sides adjacent to equal angles in proportion
3) three pairs of sides in proportion
4) hypotenuse and another side in a right angled triangle in proportion to matching sides

Question 3

Parallel line types?

Answer 3

Corresponding = /:
Alternate = */.
Vertically opposite = |
Co- interior = |: (a+b) = 180

Question 4

Polygon formula for angles?

Answer 4

n = sides

S = 180(n-2)

AND

the sum of the exterior angles is 360

Question 5

Types of triangles?

Answer 5

Acute angle = angles are below 90
Obtuse angle = 1 angle is above 90
Right angle = 1 angle is 90
Equilateral = all angles 60 
Isoceles = 2 angles and 2 sides are equal
Scalene = everything is different sizes

Question 6

Scale factor?

Answer 6

They are the same shape but different sizes

Scale factor = image length/original length