When two triangles have the same corresponding angles, they are said to be similar.
Similar triangles have the same shape but not necessarily the same size, meaning their corresponding angles are equal and their corresponding sides are proportional.
Total pages = 10 + 12 + 8 + 10 = 40.
Average = 40 ÷ 4 = 10 pages per day.
To find the percent decrease:
Original temperature = 88°F
New temperature = 77°F
Decrease = 88 - 77 = 11°F
Percent decrease = (Decrease / Original temperature) × 100
= (11 / 88) × 100
= 12.5%
Rounding Rule for Two Decimal Places:
Look at the third decimal digit (6 in 3.8461).
If it is 5 or greater, round the second decimal digit up (4 → 5).
If it is less than 5, keep the second decimal digit unchanged.
Step-by-Step Rounding:
Original: 3.8461
Third decimal digit = 6 (≥5), so round the second decimal (4) up to 5.
Result: 3.85
The union (∪) of sets includes all unique elements from both sets.
From X = {3,4,5,6} and Y = {1,2,3,8}, their union is {1,2,3,4,5,6,8}.
Integers are whole numbers (positive, negative, or zero) without fractions or decimals.
Examples: ...,−2,−1,0,1,2,...