mathematics Flashcards
what is meant by the root of a number
the root of a number is one or two or more equal numbers that, when multiplied together, will produce the number
what is the eighth power of 2
256
what is the square root of 4,096
64
what is the square of 99
9,801
what is the cube of 5
125
what is the cube root of 1,000
10
what is the base of this expression, 10^3
3
what is meant by scientific notation?
a method of writing very large or very small numbers using powers of 10
what is an angle?
a figure formed by two lines radiating from a common point
what i meant by a right angle?
an angle of 90 degree
what is an obtuse angle?
an angle greater than 90 degree but less than a straight line
what is an acute angle?
an angle between 0 degree to 90 degreees
what is a quadrant
one fourth of a circle
what is a sector?
the portion of a circle bounded by two radii and one of the intercepted arcs
what is a polygon?
a closed figure having three or more sides
what is an acute triangle?
a triangle with three acute angles
what is an obtuse triangle?
a triangle with one obtuse angle
what is a right triangle?
a triangle containing a 90 degree angle
what is an equilateral triangle?
a triangle with tree equal sides
what is an isosceles triangle?
a triangle with two equal sides
what is a scalene triangle?
a triangle in which no two sides are equal
what is the hypotenuse of a right triangle?
the side opposite the right angel
what is a quadrilateral?
a polygon having four sides
what is a parallelogram?
a closed four-sided figure in which the opposite sides are parallel
what is a trapezoid?
a closed four-side figure in which only one pair of the opposite sides are parallel
what is a hexagon?
a closed figure with six equal sides
what formula is used to find the area of a circle?
A = 0.7854 * D^2 or , A= Pie R^2
what formula is used to find a volume of a cylinder?
V = .07854 * D^2 * H
what formula is used to find area of a rectangle?
A = L * H
what formula is used to find the volume of a rectangular solid?
V = L * W * H
what formula is used to find the area of a triangle?
A = (B * H) divide by 2
what is the significance of the constant?
Pi ( 3.145 ) is the constant amount the circumference of a circle is greater than its diameter
what is meant by a ratio and how is a ratio expressed?
a fraction that compares one number to another; for example, 6:2 is a ratio
what is meant by a proportion?
a statement of equality between two ratios; for example, a/b = b/c is a proportion
what is meant by a percentage?
a fraction having 100 as the denominator. for example”65% = 65/100
what is meant by a negative number?
a number less than 0, or a number preceded by a minus (-) sign
what steps are used to add signed numbers?
- add all numbers having a plus sign
- add all number having a minus sign
- of these answers, subtract the smaller from the larger number. the sign of the answer will be the sign of the larger number
what steps are used to subtract signed numbers?
- change the sign of the subtrahend ( the number that is being subtracted).
- if the signs are alike, add the two numbers and attach the common signs
- if the signs are different, subtract the smaller from the larger and give the answer the sign of the larger
what steps are used to multiply signed numbers?
- multiply the numbers, disregarding the signs
- if the signs of the two numbers are alike, the sign of the answer is positive
- if the signs os the two numbers are not alike, the sign of the answer is negative
what steps are used to divide signed numbers
- disregard the signs and divide as though the numbers had no sign
- if the signs of the two numbers are alike, the sign of the answer is positive
- if the signs of the two numbers are not alike, the sign of the answer is negative
