Trigonometry
What rule do you use to find an angle if you know the adjacent and the opposite sides?
tan(theta)=opp/adj
What is Pythagoras' Theorem?
c2=a2+b2
What is 40% of 70?
28
What is the simple interest formula?
I =(Prt)/100
How many meters are 3.4kms?
3400m
Theta= sin-1(?/hyp)
opposite
If the two short sides of a triangle are 3 and 4, what is the hypotenuse?
5
Decrease 120 by 25%.
90
If $240 is invested at a rate of 5%p.a. for 9 years, how much interest is earned?
$108
What is the formula for the area of a circle?
A=2 x pi x r2
What do all of the angles inside a triangle add to?
1800
If a triangle has two sides equal to 3m, how long will the fourth side have to be for the triangle to be a right-angle triangle?
4.24m
What percentage of 80 is 16?
20%
If $3400 is invested at 4.32%, how much money will be in the account after 10 years?
$4838.20
What is the first three digit square number?
100
If the hypotenuse of a triangle is 16m and the adjacent if 4m, what is the unknown angle?
75.520
If one triangle has two short sides, one of 5m and one of 3m, and another has two short sides both 4m each, which has the longer hypotenuse?
5m and 3m triangle.
A store has bars off soap on sale for 20% off and then mark them down a further 10%, what is the new sale price if they were originally $3.20 each?
$2.30
How long will I have to invest $60 into an account earning 2.3%p.a. if i want to end up with twice my money in my account?
43.48 years.
The number pi and the angle theta are represented using letters of which alphabet?
The greek alphabet?
If a triangle has an angle of 400 and an opposite side of 15.4m, how long is the hypotenuse of the angle?
23.96m
What is Pythagoras theorem rearranged so that it is a=?
a=sqrt(c2-b2)
If two stores are having a sale on toothpaste. Both typically sell the toothpaste for $3 a tube. Store A has 30% off and then an extra 10% off. Store B has 20% off and then an extra 20% off. Which store has the best deal?
Store A
Which account should I invest my money in to earn the most interest? An account earning 4.3% p.a. for 4 months, or and account earning 5.2% p.a. for 3 months?
4.3% p.a. for 4 months.
What is the name of the branch of Mathematics that involves shapes?
Geometry.