Monday, October 24, 2011
Perpendicular Bisector
This cross is an example of a perpendicular bisector because the longer part intersects the shorter part at the midpoint, and it forms a 90 degree angle.
Median, Altitude
Congruent
Legs & Base of Triangle, Hypotenuse
This image contains four right triangles, one on each side of the square with the green dot in the center.
A right triangle is a triangle with a right angle.
Also within the right triangle are two legs and a hypotenuse. The hypotenuse is the side across from the right angle, and the legs are the sides connecting the right angle.
This right triangle is also an isosceles triangle. The hypotenuse is also the base.
Sunday, October 16, 2011
Obtuse Triangle
Isosceles Triangle, Equilateral Triangle, Acute Triangle
This yield sign is an example of an isosceles triangle, an equilateral triangle, and an acute triangle.
An isosceles triangle is a triangle with at least two sides that are equal in length. This triangle has three.
An equilateral triangle is a triangle with sides that are all equal in length, and it also has equal angle measures.
An acute triangle is a triangle with three angles measuring under 90 degrees.
Triangle's Vertex and Sides, Scalene Triangle, Right Triangle
A scalene triangle is a triangle with three sides, each of different length.
A right triangle is a triangle with exactly one right angle, as seen in the top angle on this triangle.
This fancy ruler also can be used to point out a vertex of the triangle, which is any of the three red markings, and the sides of the triangle, which are marked by the yellow lines.
The vertex in a triangle is a point in a triangle.
The sides of a triangle are the lines which make up the triangle.
Saturday, October 15, 2011
Alternate Interior Angles, Corresponding Angles
The wire to my straightener cuts through the lines at the top and bottom of the counter boarder to form corresponding angles (shown with the red lines), along with alternate interior angles (shown with the yellow lines).
Corresponding angles are angles on the same side of the bisector that cuts though two parallel lines, and on the same side of each of the parallel lines.
Alternate interior angles are angles formed when a bisector cuts through two parallel lines. They are the angles located on the inside of the parallel lines, on opposite sides of the bisector.
Corresponding angles are
Parallel Lines
Perpendicular Lines
Vertical Angles
Complimentary Angles
Supplementary Angles
Friday, October 14, 2011
Acute/Obtuse Angle
This picture shows examples of both acute, and obtuse angles. An acute angle can be seen on the black stick's right (our left) arm, where the elbow is the point. An obtuse angle can be seen on his left (our right) arm, where the elbow is also the point.
An acute angle is two lines who meet and form an angle lower than 90 degrees, and an obtuse angle is an angle over 90 degrees.
Right Angle
Opposite Rays
Intersection
Collinear
Plane
Line
Thursday, October 13, 2011
Line Segment
Equidistant
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