How to do terrible triangle trouble puzzles??

Mathematics

2 answers:

Vinvika [58]3 years ago

7 0

OK so it is not as hard as it seems if you add all the angles inside of one triangleit will always be 180 if you did it right and if you and 2 conecting triangs side by side if they are a stright line you would also get 180 ..and if it is not a triangle and it is some type of quadralateral, meaning a shape with 4 sides, you should always add up to 360

For example where you got 50 degrees all you had to do was add up your givin angles and subtract it by 180 since it is a triangle and that would give you 50 if you have any more questions on this just ask

Marianna [84]3 years ago

4 0

I would start at making it more easy by asking my dad or mom for help

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Among 18 students in a room, 7 study mathematics, 10 study science, and 10 study computer programming. Also, 3 study mathematics

tatyana61 [14]

Answer:

2 students study none of the subjects.

Step-by-step explanation:

Consider the attached venn diagram. First, we place that 1 student studies the three subjects. Then, we notice that 3 students study math and science, then 2 students study math and science only, since we have 1 that studies the three subjects. In the same fashion, we have that 3 students study Math and computer programming only (since they are 4 in total). Note that since 7 students study math, and we already have 6 students in our count in the math subject this implies that 1 student studies only math (the total number of students inside the math circle must add to 7).

We also have that 4 students study science and computer programming only. Which implies that we must have 3 students that study science only (10 students that study science in total) and 2 students study computer programming (for a total of 10 students). The total number of students that study none is the total number of students (18) minus the amount of students that is inside the circles (16) which is 2.