Angles (fill me in)
angles in a a triangle add upto ....
180 degrees
collect the like terms
3x + 6 - 14 - 7x + 5 +5x =
x - 3
What is 8% of $20
$1.60
What is Pythagoras's theorem?
a2+b2=c2
What is the area formula for a trapezium?
A = 0.5 x h x (a + b)
What are the three angles that can be found in parallel lines?
1. Alternate angles
2. Corresponding angles
3. Co-interior angles
expand the following
3y(y - 2)
3y2 - 6y
Express 20 seconds as a percentage of 1.2 minutes. Calculate to the nearest percentage.
28%
Pythagoras's theorm is used for what type of triangle?
right angled triangles
Convert 15cm2 to mm2
1500 mm2
What are supplementary angles?
supplementary angles are angles that add upto 180 degrees
Write an expression for the following sentence.
three less than double x is divided by 7
(2x-3)/7
Isra bought a phone for $650 and later sold it for $400. Calculate the percentage loss to the nearest percentage.
38%
A right angled triangle has 2 short sides that are 13 cm and 14 cm in length respectively. what is the length of the hypotenuse (to the nearest cm)?
19 cm
What is the area of a semi circle with a diameter of 6 cm? answer to the nearest cm.
Area = 14 cm2
What shapes have an angle sum of 360 degrees?
quadrilaterals
factorise the following expression:
15x2y + 5 x2y3
5x2y(3 + y2)
A TV is worth $1200 pre-GST. What is the price of the Tv including GST?
$1320
A ladder that is 6m long is leaning against a wall. If the base of the ladder is 2m from the wall, how far up the wall did it reach? (give your answer correct to 2 decimal places)
5.66m2
If a square has a perimeter or 24mm. What is it's area?
Area = 36 mm2
the exterior angle in a triangle is equal to the ___ _____ interior angles
two opposite
Sarah is twice as old as her brother Adam now.
Write an expression for Sarah's age in 5 years.
let S = Sarah age and A = Adam's age
S = 2A + 5
A shirt is sold for $43 after a discount of 21%. What is the original price of the shirt? (give your answer to 2 decimal places)
$54.43
What is the height of an isosceles triangle that has 2 equal sides of length 10cm and a base of of 6cm? give your answer to 2 decimal places.
height = 9.54 cm
What is the perimeter of a quadrant with a radius of 5cm. Give your answer to 2 decimal places
P = 17.85 cm