Maths (Geometry) Flashcards
(21 cards)
what is a Line
A straight one-dimensional figure that extends infinitely in both directions.
what is a ray
A part of a line that starts at one point and extends infinitely in one direction.
what is an acute angle?
less than 90°
what is an obtuse angle?
more than 90° but less than 180°
what is a straight angle?
exactly 180°
what is a right angle?
exactly 90°
what is a line?
Lines that never meet and are always the same distance apart.
what is an Equilateral triangle
all sides equal
what is an Isosceles triangle
two sides equal
what is a Scalene triangle
no sides are equal
what is a Quadrilateral
A polygon with four sides.
meaning of Perimeter
The total distance around a shape (sum of all side lengths).
meaning of Area
The amount of space inside a shape.
meaning of Vertex
The corner point where two lines meet.
meaning of Polygon
A shape with straight sides that is closed.
meaning of triangle
A shape with 3 sides.
meaning of square
A shape with 4 equal sides and 4 right angles.
meaning of rectangle
A shape with 4 sides and 4 right angles. Opposite sides are equal.
meaning of radius
A line from the middle of a circle to the edge.
meaning of diameter
A line across the circle, going through the middle.
meaning of parallel lines
Lines that never touch no matter how far they go.
