Unit 10 Flashcards
0
Q
Vertex
A
The middle angle
EX.
Vertex in triangle DYT is Y
1
Q
Triangle
A
3 sided polygon
2
Q
Line Segments
A
The sides of a triangle
3
Q
2 classification ways for triangles
A
Angles and sides
4
Q
4 types of angles
A
- acute = less than 90
- obtuse = more than 90
- right = exactly 90 (corner)
- straight = exactly 180 (straight line)
5
Q
Ways to classify a triangle by ANGLES
A
- acute = all acute angles
- obtuse = one obtuse angle
- equilateral = all equal angles
- right = one right angle
6
Q
Ways to classify a triangle by SIDES
A
- scalene = no equal sides
- isosceles = 2 equal sides
- equilateral = all equal sides
7
Q
Pythagorean Theorem
A
The theory that if you add up the area of the squares of the legs of a right triangle, you will get the area of the square of the hypotenuse
(a^2 + b^2 = c^2)
8
Q
Sides of a right triangle
A
Legs are next to the right angle, which form the right angle (a and b)
the Hypotenuse is across from the right angle (c)
9
Q
Adjacent
A
Next to
10
Q
Polygon
A
- closed figure
- 3.. line segments
- sides intersect only at end points
11
Q
Non Polygons
A
- A circle or cone
- a bow tie like figure
- an open figure (the letter Z)
12
Q
Classify Polygons
A
Triangle 3 Quadrilateral 4 Pentagon 5 Hexagon 6 Heptagon 7 Octagon 8 Nonagon 9 Decagon 10
13
Q
Formula for SUM of all angles
A
(n-2)180
14
Q
Regular Polygon
A
A polygon with congruent angles and sides
