Maths - Term 1

Question 1

angles of elevation?

Answer 1

if viewer looking up, angle between horizontal and line of sight

Question 2

angles of depression?

Answer 2

if viewer looking down on object, angle between horizontal and line of sight

Question 3

to find exact ratios, what two triangles do you make?

Answer 3

equilateral triangle with all sides 2, split in half.

Isosceles triangle with side 1 and 45 degree angles

Question 4

three different types of clusters?

Answer 4

symmetrical - .nNn.
positively skewed - .Mm.
negatively skewed - .mM.

Question 5

5 point summary?

Answer 5

lowest score
lower quartile
median
upper quartile
higher score

Question 6

equilateral triangle? (3)

Answer 6

all sides equal
all angles 60degrees
three axis of symmetry

Question 7

isosceles triangle? (3)

Answer 7

two sides equal
base angles equal
one axis of symmetry

Question 8

scalene triangle? (2)

Answer 8

no equal anything

no symmetry

Question 9

trapezium? (2)

Answer 9

one pair of parallel sides

no symmetry

Question 10

kite? (2)

Answer 10

two pairs of adjacent sides equal

one pair of opposite angles equal

Question 11

parallelogram? (4)

Answer 11

opposite sides equal and parallel
opposite angles equal
no axis of symmetry
diagonals bisect each other

Question 12

rhombus? (5)

Answer 12

all sides equal
opposite sides equal/ angles parallel
two axis symmetry
diagonals bisect at right angles
diagonals bisect the angles of the rhombus

Question 13

angle sum of a polygon?

Answer 13

A=(n-2)*180