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marishachu [46]
3 years ago
12

Please answer quickly! will give brainiest. (100 points!!)

Mathematics
1 answer:
Triss [41]3 years ago
5 0

Answer:

1. 30°

2. 1:1:\sqrt{2}

3. 20cm

4. 5cm

Step-by-step explanation:

for the first one:

we have the triangle RVT and we know that

\angle V = 90\\\\\angle R = 60

so \angle T + \angle V+\angle R = 180

so

\angle T = 30

for the second one

we know by specials right triangles that the sides are

x:x:x\sqrt{2}

divide by x and get

1:1:\sqrt{2}

for the third one

again by 30-60-90 triangle we know that

2BC=AB\\\\2(10)=AB\\\\AB=20

for the fourth one

here we can use excersie 3 and the ratio of XY:YC = 1:1

that means they are equal so

XY=YC

XY = 5

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