What is a triangle?
The triangle has a closed shape with three straight pages and three corners (called cornerstones).
It is the simplest polygon in geometry. This is a triangle! Angle: Space between the sides measured in degree (°). c
The triangle is 2D shape.
The type of drawer is the same page
Equal triangle
All three sides are the same. flat.
The angle compared to the same page is the same. cm
The type of triangle is based on angle
Acute angle triangle
All three angles are less than 90°.
The page compared to a 90° angle is called the hypotenosis (longest side). 40°
Triangular Angle Property
The sum of all angles of a triangle is always 180°. 8.
Easy-to-use properties for triangles
This property says:
The sum of the lengths on either side of the triangle is always larger than the third page.
Yes, it’s a triangle!
Triangle Range
The triangle range is the sum of all its pages. cm
Area= (1/2). b²=c²
Here:
very, b = shorter side
= hypotenuse (longest side)
= hypotenuse (longest side)
3² +4²= 9 + 16 = 25 =5
Same part.
Examples of real life triangles
Triangles are everywhere!
Triangle parts
Match.
Similar triangles:
Same format, not the same size
The angles are the same, but the pages are proportional. triangle.
Fun Triangle Puzzle Time!
Can you answer?
1. What is the sum of all angles of a triangle?
180°
2. Which type of triangle is there on all the same pages? The triangles have angles of 90°, 30°, and 60°. What kind is it? The pages are 4 cm, 4 cm, and 6 cm. What type is it?
Isosphere triangle
5. Base = 5 cm, height = 2 cm. What is the area? cm, 6 cm, 4 cm
Scalle – All sides and angles are different 3 cm, 4 cm, 5 cm
Acute triangle <90°50°, 60°, 70°
An angle = 90°, 60°
Angle >90°100°, 40°
180°.
Actual objects such as pizza, sails, lamps, bridges, etc. use triangular shapes!
