Answer:
39?
Step-by-step explanation:
180-102=78
78/2=39
To determine to measure the unknown angle, be sure to use the total sum of 180°. If two angles are given, add them together and then subtract from 180°. If two angles are the same and unknown, subtract the known angle from 180° and then divide by 2.
Hope this helps you understand angles in a triangle
Step-by-step explanation:








Answer:
Step-by-step explanation:
<em>1).</em>
Probability is favorable outcome to total possibilities.
So, any probability will be x/80
There are 36 seventh graders, and 22 girls in eighth grade (40-18=22). 36+22=58
The probability of drawing either a seventh grader or a girl is 58/80, or 72.5%
You would use grams because it is more accurate. A letter is usually pretty light and will most likely not weigh more than 1kg (feels like a bag of sugar). 1000 grams make up a kilogram so they are a smaller unite of measure and you will more accurately find the mass of the lettter.