Sport rounds use numbers a rule book already settled. The eye has usually never put those numbers in one picture.

The rim is 3.05 metres

A basketball hoop on this board is the rim, measured from the floor, 3.05 metres. Not the top of the backboard. Not the player. Not the story of a dunk. Players who have watched thousands of hours of basketball still miss it, because the broadcast frame is the player, and the rim is wherever the player needs it to be. On this board the rim is a height. A door in a house is often shorter. A person is shorter. If your guess puts the rim at 'just above a person' you may be close or you may be a third off. A third, four to three, scores 62. Say 3 metres and then look.

Balls are diameters. A size-5 soccer ball is 0.22 metres across. A size-7 basketball is about 0.243 metres across. Those are not the distance to the rim. Mixing a diameter with a height is the axis error this shelf exists to catch. The heading says across or tall. The grip matches. If you resize a ball as if you were raising a hoop, stop and read the heading again.

Rules are exact, pictures are not

A pitch, a court, a goal: the rule book has a figure, and television has a crop. The crop fills the screen with the play. The figure is in metres the broadcast never draws against a bus or a door. This shelf draws the figure. You do not get credit for knowing the rule in words if the silhouette is double. Double scores 45. Knowing the phrase 'ten feet' for a hoop is the same test: 10 feet is 3.05 metres, and the picture still has to match. A phrase you cannot see is trivia. The red outline is the check.

Compare mode will put the hoop next to another true height with no score. Use that once. Then leave it. A player who keeps compare open during a scored round is looking up the answer in a polite voice. The answers page is the impolite voice, and it stays closed today until you finish or you choose to look. Pick one.

Small ratios, sharp scores

Many sport pairs sit closer together than a whale and a ship. A soccer ball and a basketball differ by a small ratio. Within 6 percent scores 100, so a casual 'they're the same' can be a real 100 or a miss, depending on which ball is the target. Read the name. Size-5 and size-7 are not a vibe. They are a specification. Zoom in. The stage will let you see a small gap if you stop treating both as 'a ball.'

Field lengths are the other end. They feel like geography and they are still lengths, with a rule-book version. Do not answer a pitch with a country area. The board will not pair those. Your habit might. If the reference is a hoop and the target is a field, the multiple is large and the log slider is the right tool. Say how many hoops, end to end, before you move the thumb far.

Practice and the daily five

Unlimited sport pairs are the place to separate balls from rims. Lock in. Look at whether the red circle sits inside the white one or spills out. A diameter miss is obvious once you are zoomed in, and invisible if you only watch the points. The points are the ratio. The picture is the reason. Learn the picture.

A sports daily five uses the same weights as every other shelf: one, one, two, three, three, maximum 1,000. Round five is a bad time to discover you have been sizing the backboard. Discover it on unlimited, where a miss does not get tripled. Then play the shelf if you want the shared puzzle. Friends on the mixed board are not on your puzzle. Say so before you compare totals.

What sport is not, here

There is no fantasy roster and no odds. This is not a betting aid. A correct hoop height does not predict a game. The terms page says not to use the figures as a professional instrument. A rim height is one of the few figures here that a rule book states cleanly, and still the use of it in this game is an eye test, not a coaching license.

Leave with two pictures: a rim at 3.05 metres, and a size-5 ball at 0.22 metres across. Almost every other sport object on the shelf can hang off one of those. If you remember only the phrases and not the pictures, the next red outline will be a stranger. Look at it until it is not.