Maths Flashcards
Maths
Two straight lines that are the same perpendicular distance apart for the whole of their lengths?
parallel lines
non-adjacent opposite angles formed by two or more intersecting straight lines
vertically opposite angles
two straight lines that form a 90 Deg angle when they meet or intersect
perpendicular lines
the sum of all angles on a point
revolution (360 Deg)
any straight lines that intersects 2 or more lines
transversal
the point at which 2 or more straight lines cross
intersection
angles on different intersections, on different sides of the transvesal
alternate angles
the 2 interior angles on the same side of the transversal
co-interior angles
angles at the same position on each intersection
corresponding angles
The side opposite the right angle in a right angles triangle
hypotenuse
the value of a number when you multiply it by itself
the square
the shortest distance between a vertex of a triangle and the opposite side
perpendicular height
Angles on a straight line add up to____________?
180 Deg
Vertically opposite angles are _________?
Equal
What does the theorem of Pythagoras state?
in a right angles triangle, the square of the hypotenuse is equal to the sum of the squares on the other 2 sides?
(A² + B² = hypotenuse²)
The sum of the lengths of all 3 sides of a triangle is the
perimeter
The equation to work out the area of a triangle is …
(base x perpendicular height) /2
The result you get when you take the square root of a number which is not a perfect square
surd
an instrument used to measure the size of an angle in degrees
a protractor
a direction as that taken by the hands of a clock
clockwise
a line which divides either a line or an angle into 2 equal parts
bisector
an instrument used for drawing arcs of a specific length
compass
a part of a circumference of a circle
arc
the point at which 2 or more lines or arcs cross each other
point of intersection
an accurate drawing based on given measurements
construction
triangles that have 3 pairs of equal angles
equiangular triangles
triangles that are the same shape as each other but not the same size. They have identical angles and their sides are in proportion.
similar triangles.
triangles that are exactly the same in every way.
congruent triangles
the angle formed when one of the sides of a triangle is extended.
exterior triangle
The angle that lies between the 2 given sides.
included angle
a circle that is drawn inside a triangle and touches all sides but does not cross any of them.
inscribed circle
a circle that passes perfectly through the three vertices of a triangle
circumscribed circle
a circle that lies outside the triangle, but touches one of its sides and 2 of its extended sides.
escribed circle
a many sided 2d figure which has all its sides equal and all its angles equal
regular polygon
a 2D figure which has all its vertices on the same surface
plane figure
a polygon with 6 sides
hexagon
a polygon with 5 sides
pentagon
To identify a parallelogram, look for
- both diagonals bisecting each other
- both pairs of opposite sides parallel
- both sides of opposite sides equal
- one pair of opposite sides equal and parallel
- both pair of opposite angles equal
To identify a rectangle, look for…
- a parallelogram with a right angle
- equal diagonals, which bisect each other
- all four corner angles are equal
To identify a square, look for…
- a rectangle with a right angle
- equal diagonals, which bisect each other at 90 Deg
- equal diagonals, which bisect corner angles into equal 45 Deg angles
To identify a rhombus, look for….
- a parallelogram with a pair of adjacent sides equal
- both diagonals bisecting each other at 90 Deg
- both diagonals bisecting the corner angles
a triangle that has three 60 Deg angles and 3 equal sides
equilateral triangle
a triangle that has 2 equal sides, opposite the eual angles
isosceles
a triangle that has no equal angles
scalene
The perimeter of a circle
circumference
If a 2D shape that divides the plane into 2 exact regions
a simple closed shape
a shape that can be divided into 2 or more basic shapes
composite shape
