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sasho [114]
3 years ago
5

BRAINLIEST IF ANSWERED 

Mathematics
2 answers:
deff fn [24]3 years ago
8 0

Answer:

The measure of angle K=25°.

Step-by-step explanation:

It is given that ΔKNM is an isosceles triangle with KL=LM and ∠K=∠M, and  NL bisects ∠KNM, thus

∠KNL=∠LNM

⇒5x+10=6x-1

⇒x=11°

Thus, ∠KNM=∠KNL+∠LNM

∠KNM=5x+10+6x-1=11x+9=11(11)+9=130°

Now, Since, ∠K=∠M,using the angle sum property in ΔKNM is an isosceles triangle with KL=LM and ∠K=∠M, and  NL bisects ∠KNM, thus, we get

∠NKM+∠KNM+∠KMN=180°

⇒2∠NKM+130°=180°

⇒2∠NKM=50°

⇒∠NKM=25°

Thus, the measure of angle K=25°.

bagirrra123 [75]3 years ago
6 0

we know that

An isosceles triangle has two equal sides and two equal angles

so

KN=NM

∠K=∠M

The line NL bisect the triangle KNM

therefore

5x+10=6x-1

Solve for x

6x-5x=10+1

x=11\°

<u>Find the measure of angle N</u>

∠N=5x+10+6x-1

substitute the value of x

∠N=5*11+10+6*11-1=130\°

<u>Find the measure of angle K</u>

∠N+∠K+∠M=180\°

remember that

∠K=∠M

∠N+2∠K=180\°

substitute the values and solve for ∠K

∠K=\frac{1}{2}(180\°-130\°)=25\°

therefore

<u>the answer is the option</u>

the measure of angle K is 25\°

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