1. Philip's Geometry Guide to Success Lines Angles Triangles Quadrilaterals Circles

2. Lines

Points

Line Segments

Rays

Lines

Intersecting Lines

Perpendicular Lines

Parallel Lines

Skew Lines

3. Points

A point is a precise location in space. It is labeled with a letter.

Point a Point b Point c Point d 4. Line Segments

A line line that starts at one point and ends at another

5. Ray

A line that starts at a point and keeps going past the other

6. Intersec t ing

Two lines that meet at a point and do not make 90 degree angles

7. Perpendicular

The lines intersect at right angles

8. Parallel

Lines that never cross and are on the same plane

9. Skew

Lines that are not on the same plane

10. Plane

A flat surface that goes on forever in all directions and is defined by three points

P 11. Angles

acute

obtuse

right

straight

vertex/vertices

complementary

supplementary

vertical/ opposite

adjacent

12. Acute

An angle that is less than a 90 degree angle

13. Obtuse

An angle that is more than a 90 degree angle

14. Right

An angle that is exactly 90 degrees

15. Straight

An angle made up by two 90 degree angles

16. Vertex/Vertices

The point where the lines to make the angle meet

17. Complementary

Two angles that if you add them together you will get 90 degrees

4545 18. Supplementary

Two angles that if added together you get 180 degrees

110 70 19. Vertical/Opposite

An angle that is opposite to the same angle

20. Adjacent

An angle that is sharingthe same vertex with another angle

F D E C Angle DFE Angle EFC 21. Triangles

Right

Obtuse

Acute

Scalene

Isosceles

Equilateral

Sum of internal angles

Perimeter

Area

22. Right

If the largest measure of the triangle is 90 degrees

23. Obtuse

When the largest angle of the triangle is more than 90 degrees

24. Acute

When the largest angle of the triangle is less than 90 degrees

25. Scalene

When all the sides of the triangle are not equal

26. Isosceles When there are two sides of the triangle that are the same measure 27. Equilateral

When all the sides of the triangle have the same measure

28. Sum of internal angles

All the sides in the triangle add up to 180 degrees

60 60 60 29. Perimeter

The sum of all the sides of the triangle

50 70 60 50+70+60=180 30. Area

When you multiply length times width and then divide it by 1/2.

30 60 60 times 30 divided by 1/2 31. Quadrilaterals

Quadrilaterals

Trapezoid

Parallelogram

Rectangle

Rhombus

Square

Area of a rectangle

Area of a square

Area of aparallelogram

Area of atrapezoid

32. Trapezoid

A figure that has 1 set of parallel sides.

33. Parallelogram

A figure that has 2 sets of parallel sides

34. Rectangle

A figure that has 2 parallel sides and all the angles are congruent

35. Rhombus

A parallelogram that has no congruent sides

36. Square

A parallelogram that has 2 parallel sides and all the angles are congruent

37. Area of a rectangle

You multiply length times width

L W L times W= A 38. Square

You multiply length times width

L W L times W = A 39. Area of a Parallelogram

You multiply length times width

8 12 8 times 12= A 40. Area of a Trapezoid

You put 2 trapezoids together to make arectangle and ad the top to the bottom then multiply it to width and divide by 2.

W L 4+ 6= 10 divided by 2 4 41. Circles

Chord

Diameter

Arc

Radius

Sector

Circumference

Area of a Circle

42. Chord

The chord is the longest line segment in the circle

43. Diameter

The diameter is the radius times 2

44. Arc

The arc is the distance on the outside edge of the circle

45. Radius

The radius is diameter divided by 2

46. Sector

The sector is a piece of the area.

47. Circumference

The distance around the circle (C= D times 3.14)

48. Other Polygons

Hexagon

Octagon

Pentagon

49. Hexagon

The hexagon is a polygon with six sides

50. Octagon

The octagon is a polygon with eight sides

51. Pentagon

The pentagon is a polygon with five sides

52.

The End