HELP!
1 answer:
The missing length of the triangle is 8.1 cm.
Solution:
Given triangle ACB is a right triangle.
AC = 4 cm, BC = 7 cm.
To find the length of AB:
Using Pythagoras theorem,
<em>In right triangle, square of the hypotenuse is equal to the sum of the squares of the other two sides.</em>
Taking square root on both sides.
AB = 8.06
AB = 8.1
The missing length of the triangle is 8.1 cm.
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Remember if straight line total is 180 degree
Answer:
112
Step-by-step explanation:
Let A be a subset of S that satisfies such condition.
If 3∈A, then the other three elements of A must be chosen from the set B={1,2,5,6,7,8,9,10} (because 3 cannot be chosen again and 4 can't be alongside 3). B has eight elements, then there are ways to select the remaining elements of A (the binomial coefficient counts this). The remaining elements determine A uniquely, then there are 56 subsets A.
If 4∉A, we have to choose the remaining elements of A from the set B={1,2,5,6,7,8,9,10}. B has eight elements, then there are ways to select the remaining elements of A. Thus, there are 56 choices for A.
By the sum rule, the total number of subsets is 56+56=112