Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
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6 Given: a lb
Prove: 41 = L2 (Hint: This proof Open with
more than two steps. Remember,
each reason should be a single
sentence or less.)
7 Given: LACB = 90°,
AD 1 BD
A
Prove: LC = ZD (Hint: This proof takes
more than three steps.)
M
8 Given: ZMOR
(3x + 7)°,
(4x
МО 1 ОP
ZROP =
1)°,
Which angle is larger, ZMOR or ZROP?
P.
64
Chapter 2 Basic Concepts and Proofs
9 You are the engineer for the development
of a new subdivision in your town. When
you design your street intersections, is it
better to make the intersections perpen-
dicular or oblique? Explain why.
Note When two lines intersect and are
not perpendicular, they are called
oblique lines.
Street Intersections
Perpendicular
Oblique
10 PQRS is a rectangle
a Find the coordina Page
b Find the area of the rectangle.
`y-axis
S(10,
4 5
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