I forgot the formula for the angle of BOAT trapezium ,please help
It's not a trapezium; it's a kite.
Find the area of triangle OAT and multiply by 2. (Then subtract the area of the sector of the circle.)
thanks a lot
how do you post the image anyway
Welcome to the forum.
There are many on-line sites that will let you store an image and get the bbCode to embed in your post. I use imgur.
Here's the latest one that I did:
Hope that helps,
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