Question

Class 11th:

All Formulas from:
"Two Dimensional Analytical Geometry"
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♣ Copied answers and wrong answers will be reported..​

Answer 1

Step-by-step explanation:

Pythagoras Theorem Formula c2 = a2 + b2

Area of a Triangle ½ × b × h

Perimeter of Triangle a + b + c

Area of a Square a2

Perimeter of a Square 4a

Area of a Rectangle l × b

Perimeter of a Rectangle 2 (l + b)

Area of a Circle π × r2

Circumference of a Circle 2πr

Surface Area of a Cube 6a2

Volume of a Cube a3

Curved Surface Area of a Cylinder 2πrh

Volume of a Cylinder πr2h

Curved Surface Area of a Cone πr [r + √(h2+r2)], i.e. πrl

Volume of a Cone ⅓ πr2h

Surface Area of a Sphere 4πr2

Volume of a Sphere 4/3 πr3

Distance Between Two Points in 3D √[(x2 − x1)2 + (y2 − y1)2 + (z2 – z1)2]

Distance of a Point From Origin √(x2 + y2 + z2)

Midpoint of a Line Segment [½ (x1 + x2), ½(y1 + y2), ½(z1 + z2)]

Coordinates of the Centroid of a Triangle [⅓ (x1 + x2 + x3), ⅓ (y1 + y2 + y3), ⅓ (z1 + z2 + z3)]