MATH TERMS THAT START WITH H

Half Turn :

A 180° turn as from front to back and vice versa.

Hectare :

Hectare is a metric unit area defined as 10,000 square meters.

Height :

Vertical distance from base to the top. The another name of height is altitude.

Hemi Sphere :

Half of the sphere.

Heptagon :

A polygon with 7 sides and 7 angles.

Hexagon :

A six sided polygon.

Histogram :

Histogram is a graphical representation in statistics. It shows the visual impression of the distribution data. It groups numbers in to ranges.

Horizontal :

Right angles to the vertical or parallel to the level ground. In graph paper x-axis is refer to the horizontal line. In the diagram below the line x = 1 is parallel to x axis.

Hyperbola :

One type of conics is hyperbola. Hyperbola is a set of points found by keeping the difference of the distances from two points is constant.

Hypotenuse :

The side opposite to the right angle in right angled triangle. Hypotenuse is the longest side of the right angled triangle.

Hypothesis :

An assumed statement used as a premise in an argument.

Half Angle Formulas :

In trigonometry we have half angle formulas.

sin A = 2 sin (A/2) cos (A/2)

cos A = cos² (A/2) - Sin² (A/2)

 tan A = 2 tan (A/2)/[1-tan² (A/2)]

cos A = 1 - 2sin² (A/2)

cos A = 2cos² (A/2) - 1

 sin A = 2 tan (A/2)/[1+tan² (A/2)]

cos A = [1-tan²(A/2)]/[1+tan² (A/2)]

 sin²A/2 = (1-cos A)/2

cos²A/2 = (1+cos A)/2

 tan²(A/2) = (1-cos A)/(1+cos A)

Heron's Formula :

To find the area of triangle when measurements of three sides are given.

Area of scalene triangle  =  √s(s-a)(s-b)(s-c)

Here a, b and c are the sides of the triangle and s is known as perimeter of the triangle. To find the value of s we have to use the formula

s  =  (a+b+c)/2

Harmonic Mean :

This  is nothing but the reciprocal of the arithmetic mean of the reciprocals of the given numbers.

In other words to find the H of the given numbers, we have to divide n (total number of given numbers) by the sum of the reciprocals of the given numbers.

Hour Clock Arithmetic :

If the divisor m = 12, then the arithmetic modulo 12 is called the clock arithmetic. The remainder can be related to hour numbers in a clock where 0 corresponds to the 12 hour.

Homogeneous Function :

A function of several variables is said to be homogenous of degree n if each variables are multiplying by t has the same effect as multiplying the original function by tⁿ.

That is,

f(tx, ty)  =  tⁿ f(x, y)

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