Chapter C2- triangles Flashcards
What is a right-angled triangle
one angle is equal to 90 degrees.
What is an Acute-angled triangle
all the angles are acute angles.
What is an Obtuse-angled triangle
one of the angles is an obtuse angle
What is an Isosceles triangle
Two sides are equal in length
What is an Equilateral triangle
all three sides are equal in length
What is a Scalene triangle
All three sides have different lengths
What are the properties of a triangle
The lonest side is opposite the biggest angle
In an isosceles triangle, the two angles opposite the equal sides are equal
In an equilateral triangle, all the angles are equal to 60 degrees
The sum of the interior angles of any triangle is 180 degrees
The exterior angle of a triangle is equal to the sum of the two opposite interior angles.
What is the theory of Pythagorus
In any right angled triangle, the square of the hypoteneus is equal to the sum of the squares on the other two sides.
What is the formular for calculating the area of a triangle
A= 1/2 B times perpendicular Height
