Triangles And Properties 7&8 Flashcards
1
Q
Axis of symmetry is also called
A
Line of symmetry
2
Q
Euler’s formula
A
V+F-E=2
3
Q
If all faces of a pyramid is a triangle , it’s called
A
Tetrahedron
4
Q
Rotational symmetry of rhombus
A
2
5
Q
Rotational symmetry of equilateral triangle
A
3
6
Q
Rhombus no of line of symmetry
A
2
7
Q
Hexagon no of lines of symmetry
A
6
8
Q
Hexagon rotational symmetry
A
6
9
Q
No of elements of a triangle
A
6
10
Q
Heron’s formula is used to
A
Find the area of the triangle when the three sides are only given
11
Q
Heron’s formula ?
A
A= sq. root of {s(s-a)(s-b)(s-c)}
12
Q
Law of sines
A
A/sin a = B/sin b = C/sin c
13
Q
Law of cosines use
A
To calculate the hypotenuse of any triangle
14
Q
Law of cosines
A
c2 = a2 + b*2 - 2ab cos C
15
Q
Usually in geometry angles are represented by
A
Small letters while sides are represented by big letters
