A5.1. (a). modify the code used in ex 5.1, to find the root until the error (e) reached 1% using bisection method without showing iteration. also find out the root of equation, f (x)-1+3x-x2, use initial and upper guesses 1 and 5 (b). solve the above problem by graphical method (use fplot)

4 puzzles in 3 hours

step-by-step explanation:

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1. 180°. the sum of the interior angles of a triangle is 180°, for the equilateral triangle that it has three equals side is 60°+60°+60°=180°.

2. 60°. each interior angle of a equilateral triangle is 60°

3. 120°. the measure of ∠m is 120°, the sum of the angles ∠m and ∠n is equal to 180°. so, in order to find the measure of ∠m, we have ∠m+∠n=180° > ∠m=180°-∠n > ∠m=180°-60°=120°.

4. 360°. the sum of the exterior angles of an equilateral triangle is ∠m+∠r+∠x=120°+120°+120°=360°. the exterior angles of any triangle always add 360°.