geometry

Question 1

isosceles triangle

Answer 1

• the line joining the midpoint of the base to the opposite vertex is perpendicular to the base
• the perpendicular bisector of the base passes through the opposite vertex
• the base angles are equal

Question 2

cosine rule

Answer 2

c^2=a^2+b^2-2ab*cos(C)

Question 3

sine rule

Answer 3

a/sinA=b/sinB=c/sinC

Question 4

parallelograms

Answer 4

• opposite sides are equal in length
• two pairs of parallel sides

Question 5

square

Answer 5

• four equal sides
• sides meet at right angles

Question 6

rectangle

Answer 6

• pairs of opposite sides are equal in length
• sides meet at right angles
• opposite sides are parallel

Question 7

rhombus

Answer 7

• four equal sides
• diagonals are perpendicular

Question 8

trapezium

Answer 8

• one pair of parallel sides

Question 9

kite

Answer 9

• two pairs of adjacent sides that are equal in length
• perpendicular diagonals
• diagonals do NOT bisect eachother

Question 10

what does bisect mean

Answer 10

divide into two parts

Question 11

semicircle 90 degree theorem

Answer 11

if an angle from the circle joins either end of the diameter, the angle will always be 90 degrees.

Question 12

circle tangent and radius

Answer 12

always perpendicular

Question 13

what does subtend mean

Answer 13

subtend means to enclose

Question 14

convex polygon

Answer 14

shape where all interior angles are less than or equal to 180 degrees

Question 15

what is the sum of all the exterior angles of a convex polygon

Answer 15

360

Question 16

what does circumscribed mean

Answer 16

the vertices of the polygon intersect with the circumference of the circle