May I please receive help ?
Please

(a) AB = 13

(b) m∠F = 30°

Step-by-step explanation:

(a) The triangle shown is an equilateral triangle, meaning all of its sides are the same length. We know this to be true because all of its angles are the same - 60°. So, if one side is 13, we know that all the sides have a measure of 13, and can thus say that AB = 13.

(b) In this triangle, the lines coming from angle E are the same length. Because of this, points F and D have the same measure. We already know the value of one point - E is 120. If all the angles in a triangle add up to 180, and we already know 120, we know that F and D have to have a value that, doubled, equals 60, since 180 - 120 is 60. 30 doubled is 60, so we know that the value of F is 30.

If you have any further questions or need clarification, let me know!

the 1st digit is in the 100s n its 1

step-by-step explanation:

3,589÷18 = 199.389

so the first digit of the quotient is in the 100s n its 1