4 years ago

One angle in a triangle is 115 degrees. The other two angles are congruent. What is the measure of one of the missing angles?

1 answer:

8 0

Hey there! :)

Triangles measure 180°

1 side = 100°

180 - 100 = 80

The measure of both unknown angles = 80°

Both are congruent, or the same. That means you have to divide by 2.

80 ÷ 2 = 40

? = 40°

Hope this helps :)

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A lock is using 3 digits from 1 to 7 as its lock combination, the numbers can be repeated. How many different possible lock comb

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The question is an illustration of selection (or combination)

The number of lock combination is 343

The given parameters are:

$n = 7$ --- the number of digits to select from

$r = 3$ --- the number of digits the lock uses

Because the digits can be repeated, the number of lock combinations is:

$Lock = n^r$

So, we have:

$Lock = 7^3$

$Lock = 343$

Hence, the number of lock combination is 343