Straight angle : সরলকোণ;
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straight angle  straight angled  See Words Also In
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Appropriate Prepositions
Consolidate for (শক্তিশালী করা): The four new companies consolidated for greater efficiency.
Due to (কারণে): His absence is due to illness.
Indulge in (আসক্ত): You should not indulge in social media.
Make from (কোনো উপকরণ দ্বারা সরাসরি তৈরী নয় বোঝাতে): Paper is made from bamboo.
Succeed in (সাফল্য লাভ করা): He succeeded in life.
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Idioms
Carry the day (জয়লাভ করা) The boys carried the day in the debate competition.
Easy and free (অমায়িক): The boy is easy and free, so he has many friends.
Far and wide (সর্বত্র): His fame spread far and wide.
To the letter (in all details, অক্ষরে অক্ষরে) —Follow my advice to the letter.
Well up (সুপন্ডিত)- Dr. Shahidullah was well-up in Bengali language.