First things first.. What type of triangle
If u are taking about a normal triangle here is some:
∠60+∠60+∠60
∠30+∠90+∠60
∠11+∠82+∠87
Answer:
2nd option
Step-by-step explanation:
cosT = = =
<h3>The average speed of the entire trip of hina in km/h is 51.42 km/h</h3>
Given ,
- Distance travelled in first 2 hrs = 120 km
- Distance travelled in next 4 hrs = 180 km
We need to find
Firstly finding speed
• Speed in first 2 hrs = 120/2 = 60km/h
• Speed in next 4 hrs = 180/4 = 45 km/h
As we know that ,
- Average speed = 2V₁V₂/V₁ + V₂
Substituting known values we have ,
⇒ Average speed = 2 ( 60 ) ( 45 ) / 60 + 45
⇒ Average speed = 2(60)(45)/105
⇒ Average speed = 5400/105
⇒ Average speed = 51.42 km/h
First you subtract whatever you do on one side to the other. So first divide by 2 which cancels the 2, then repeat on other side. Divide 12 by 2 which you get 6. So now you have x-6x+34 which equals 5x+34 which then turns into 39x