Introduction to geometry
What is main topics in geometry?
Point, Line, Plane
Figures that have the same shape and size are called........
congruent figures.
The ratio of the measures of two adjacent complementary angles is 1:5. Find the measure of each angle.
15,75
The word Geometry comes from two Greek words, "GEO" and "METRIC" which together mean
to measure the earth
Congruent figures have the same.....
size and shape.
The ratio of measures of two adjacent complementary angles is 2:4. Find the sum of angles
90
Point does not have any......
size (width, length, height)
The points, lines and angles which match perfectly when two congruent figures are placed one on top of the other are called...................
corresponding elements or corresponding parts of the congruent figures.
The ratio of the measures of two adjacent supplementary angles 1:4. Find the measure of each angle.
36, 144
When a line shares a common point with another line, they are called
intersecting lines.
picture 1, a
1
∠1 and ∠2 are adjacent supplementary angles with m(∠1)=4x+75∘ and m(∠2)=5x+15∘. Find the measure of ∠2.
65
a ........can be measured because it has two endpoints. The length of a .........is only as precise as the smallest unit on the measuring device.
line segment
picture 1,b
23
∠1 and ∠2 are adjacent supplementary angles with m(∠1)=2a−80∘ and m(∠2)=a−10∘. Find the measure of each angle.
80,100