Geometric Terms By Marilyn and Alyssa:)

Angles Right Angle: An angle that is 90 degrees Acute Angle: An angle less than 90 degrees Obtuse Angle: An angle more than 90 degrees

Triangles Icosoles-An isosceles triangle is a triangle with (at least) two equal sidestriangle Scalene-No equal sides, No equal angles Equilateral- Three equal sides,Three equal angles, always 60° Obtuse- A triangle with one obtuse angle Right- A triangle with one right angle Acute- A triangle where all three internal angles are acute (less than 90 degrees).triangleacute

Lines Intersecting: Two lines that cross each other Perpendicular: Two lines that come together to form a 90 degree angle Parallel: Two lines that will never intersect

Congruent If one shape can stay the same when you turn, flip or slide it.

Adjacent Adjacent means that two lines or angles are next to each other.

Vertical Angles A pair of non-adjacent angles formed by the intersection of two straight linesadjacent anglesintersection

Supplementary Angles Supplementary means when two or more angles add up to make 180 degrees

Complementary Angles Two Angles are Complementary if they add up to 90 degrees (a Right Angle).

Quadrilaterals Square: has 4 sides, and 4 right angles that are congruent Trapezoid: has 1 set of parallel sides Parallelogram: has 2 pairs of opposite sides that are parallel Rhombus: has 4 congruent sides Rectangle:has 2 pairs of congruent sides and 4 congruent angles

Parts Of A Circle Radius- The radius of the circle is a straight line drawn from the center to the boundary line or the circumference. Diameter- The diameter is the line crossing the circle and passing through the center. It is the twice of the length of the radius. Circumfernce- The circumference of a circle is the boundary line or the perimeter of the circle.

Perimeter and Circumfrence Perimeter: The distance around a shape. You get it by adding up the lengths of each side of the shape. Circumfrence: The distance around a circle. You get it by multiplying the diameter of a circle by pi.

Area Of Various Shapes Triangles- Length* Width Rhombus- Base*Height Square- Base*Height or Side *Side Rectangle- Base*Height Parallelograms- Base*Height Circle- 3.14*Radius squared