Definitions
What does parallel mean?
When two line are in the same direction and never meet
Name the 3 classifications of triangles based on their sides
Equilateral, Isosceles and Scalene
Find the diagonal of a rectangle with a base of 12cm and height of 16cm
20cm
Andrea says you can always use Pythagoras to find the diagonal of a square if you know one side. Is he right and why?
True because...
- Pythagoras only works with right angles
- Squares only have right angles
- Only need 2 sides known to do Pythagoras
- Sides of a square are all the same
Everything inside of me adds to 180 and you can call me different things depending on if you look at my sides or angles
I'm a triangle
What is a line of symmetry?
A line through a shape that reflects both sides like a mirror perfectly
What are all of the angles in a Right Isosceles triangle?
90, 45 and 45
A parallelogram has sides 12 cm and 9 cm. If the distance between its shorter sides is 8 cm, find the distance between its longer side.
H = 6cm
What is the perimeter of a square with a length of 17cm?
68cm
I'm a special type of rectangle and all you need to find my area and perimeter is one of my sides
I'm a square
What does bisect mean?
To divide or cut a shape/angle into 2 parts
Name the 6 different types of angles we looked at before
Acute, Right, Obtuse, Straight, Reflex and Revolution
If the length of a rectangle is 5 m less than twice the width, and the perimeter is 44 m long, find its length and width.
W = 9
L = 13
A rectangle and square have the same area. If the rectangle is 9cm long and the square is 6cm long, find the width of the rectangle.
4cm
I'm like another shape but the diagonals inside of me are, while the same length, not perpendicular
I'm a rectangle
What does perpendicular mean?
When two lines meet, a right angle is made where they cross
A skateboard ramp is 10m tall and the slope is 26m long. How long is the ramp along the floor?
24m
The base of the parallelogram is three times its height. If the area is 192 cm², find the base and height.
base = 24cm
height = 8cm
The floor of building consists of 2000 tiles which are rhombus shaped and each of its diagonals are 40 cm and 25 cm in length. Find the total cost of polishing the floor, if the cost per m² is $5.
$500
I'm like another shape but my sets of angles are opposite and equal. My sides are also not the same
I'm a parallelogram
What is a polygon?
A 2D shape with only straight sides
The second angle of a triangle is twice as large as the first. The measure of the third angle is 20° greater than the first. How large are the angles?
A1 = 40
A2 = 60
A3 = 80
Find the area of the rhombus having each side equal to 17 cm and one of its diagonals equal to 16 cm.
240cm2
SURPRISE!
<3
You don't need to know my base and height to work me out. You can use my diagonals too
I'm a rhombus